In the framework of the global history of dyes, the collective volume edited by Marichal and Pretel (2024) invites exploration of "secondary dyeing economies" and peripheral extraction zones. By the early nineteenth century, the reserves of Paubrasilia echinata on the Brazilian Atlantic coast were already massively depleted, and the economic incentives to find accessible substitutes were at their maximum.

It is historically attested that the Mexican Pacific coast actively responded to this demand. Haematoxylum brasiletto (Palo de Brasil) was exploited in the dry forests of Sinaloa and Sonora and exported via hubs such as Mazatlán.

This is where the case of Caesalpinia platyloba, or Coulteria platyloba (known by the vernacular names Chakté Viga, Palo Colorado, or Paela), becomes relevant. This tree, with its yellow-orange to brown-orange heartwood, shares the same dry-forest zones of Mexico and Central America. It illustrates the dynamics of substitution: even if customs archives rarely mention this taxon by name, its integration under generic commercial labels (such as "palo de brasil") is entirely consistent with the structure of the trade.

What follows examines the conditions under which C. platyloba could plausibly have integrated into these flows. The question is not whether its presence can be documented — the archives, by their very nature, cannot answer that — but whether the commercial, ecological, and logistical conditions were such that its exclusion would itself require explanation. The argument that follows is therefore one of structural inference, not empirical demonstration, and the reader should hold it as such throughout this section.

Endowed with a heartwood rich in red pigments and a remarkable density (between 0.89 and 1.02 g/cm³, according to the CITESwoodID database, Richter & Dallwitz), C. platyloba (locally named Palo Colorado) lent itself organically to simultaneous harvesting alongside H. brasiletto. For the timber cutters and local intermediaries connected to export markets, the fine distinction between two trees producing a similar shade of red at the cut had no economic or practical reality.

This indifference was not fraudulent: it flowed naturally from the taxonomy of performance. The incidental or deliberate inclusion of C. platyloba in cargoes of braziletto or palo de brasil bound for Europe or San Francisco fits squarely within this logic, where only dyeing equivalence mattered. Here, substituting is not deceiving: it is satisfying the operational definition of the product as it existed at the time.

The inclusion of C. platyloba in historical Mexican cargoes remains a logical deduction, in the absence of direct archival evidence. It would be refuted by the discovery of customs manifests or dyers' records capable of formally distinguishing this wood from its cousins — yet commercial archives show precisely the opposite: merchants classified their woods by colour and dyeing yield, without recourse to stable botanical taxonomy. What is advanced here is therefore a matter of historical probability within a commercial system organised around use and performance, without any direct archival proof being available.

The Limits of Visual Identification

A phenomenon documented in the specialist literature further complicates any attempt at visual identification: the internal variability of Paubrasilia echinata is itself considerable. Modern science has demonstrated that the appearance of true pernambuco varies according to the conditions under which the tree grew. The age of the tree, its sun exposure, and the region of Brazil where it grew — from north to south — measurably alter the wood's density, vessel size, and chemical composition (Macedo et al., 2019; Zani, 2014). And forensic isotopic analysis — notably the strontium isotopic fingerprinting protocol developed for determining geographical origin within Brazil — has been shown, according to the abstract of Kafino et al. (2024, Science & Justice, PMID 38431373), to leave a chemically measurable signature in the wood itself. [Paper available under restricted access; only the abstract was consulted.]

The variability of P. echinata is now broadly demonstrated by independent methodological approaches: the range of pale orange, dense reddish-brown, and deep brownish-violet pieces visible in the photomontage below is consistent with genuine biological and environmental variability within a single species. This same variability forecloses any attempt to use simple visual or tactile criteria as taxonomic markers: a pale, less dense piece of P. echinata from a younger tree on poorer soil may be, under workshop conditions, visually and mechanically indistinguishable from a dense piece of Caesalpinia platyloba or C. sappan. The botanist's tools (microscopy, spectrometry, isotopic analysis) can in principle resolve these cases, but they are largely inapplicable to a finished, varnished bow without destructive sampling. The strontium isotopic protocol in particular illustrates the limits of contemporary methods: it can determine geographical origin within Brazil with measurable precision, but it has no purchase on the substitutes themselves — Mexican, Caribbean, and Central American Caesalpinioideae — whose possible presence in the historical commercial supply constitutes the underlying problem this essay examines.

This variability is directly perceptible to the naked eye. Pieces marketed in good faith under the name pernambuco exhibit visibly wider pores, a different apparent density, or less intense colour — characteristics that lead experienced practitioners to suspect a different botanical identity. The hypothesis that some of these "atypical" woods historically marketed as pernambuco actually belong to other dense-wooded Caesalpinioideae involuntarily integrated into the supply chain through harvesting or labelling confusion is not merely plausible: it is consistent with all the structural dynamics described here.

This observation is not only that of an outside observer. The xylologist H.-G. Richter, co-author of the CITESwoodID database, emphasises that wood colour is among the least reliable properties for identification, so dependent is it on light, surface age, and oxidation (H.-G. Richter, personal communication, 22 May 2026). The observation is weighty for this essay's argument: the criterion on which the commercial sorting of red woods precisely rested — colour at the cut — is, from the standpoint of contemporary identification science, one of the most misleading that exists. The taxonomy of performance did not rely on a proxy for want of something better while awaiting science: it relied on the very index that modern science judges the least discriminating of all.

The indeterminacy surrounding the species of Brazilwood is not a retrospective construction on our part: it is explicitly acknowledged by the nineteenth-century commercial sources themselves. Regarding "brésillet" — a commercial category encompassing several red dyewood species — the Dictionnaire universel théorique et pratique du commerce et de la navigation (Guillaumin et Cie, eds., 1859) concedes without equivocation:

« On ignore à quelle espèce du genre cæsalpinia il faut l'attribuer. » ["It is not known to which species of the genus Caesalpinia it should be attributed."] Guillaumin, Dictionnaire universel du commerce, 1859, article "Brésillet"

A century after Linnaeus had fixed binomial nomenclature, and more than half a century after Fourcroy (1800) had attempted to assign each commercial variety of Brazilwood a species of the genus Caesalpinia, the reference work of the French trade concedes that the botanical attribution of the principal competing category to Fernambouc remained unknown. The actors of commerce were therefore not mistaken through negligence: they operated in a framework where taxonomic identification was neither stable nor resolved, even at the highest level of codified commercial knowledge.

Empirical Confirmation: the Sawdust that Turns Violet

A recent observation, published incidentally by an American craftsman on a woodturning forum, provides a remarkable empirical demonstration of the dyeing nature of Caesalpinia platyloba. David Lange Engnald, a turner from Columbus (Nebraska), noticed in August 2020 that after sawing a plank of Chakté Viga, the water in a container left near his bandsaw had spontaneously turned violet through contact with the sawdust. Intrigued, he then documented a comparison experiment: the same sawdust produces, in water, a red-violet hue, and in denatured alcohol, a more saturated red-orange colouration.

This observation, made without scientific intent and outside any historical context, possesses singular demonstrative value. It establishes that C. platyloba releases, through simple contact with water, soluble phenolic pigments whose exact nature has not been analytically determined, but whose chromatic behaviour — red-violet colouration in water, red-orange in alcohol — is consistent with that of pernambuco's brazilin — and that alcohol extracts these same pigments with superior efficiency, exactly as in nineteenth-century dyeing protocols. A craftsman in Nebraska has, by accident, reproduced the fundamental gesture that motivated the transatlantic trade in red woods. The dyeing performance of C. platyloba, long inferred from its taxonomic position within the brazilin-bearing Caesalpinioideae, is here directly attested by experiment. If this wood released its pigment into the water of a workshop in 2020, it released it just as surely into the dyers' vats of Lyon or Manchester in the nineteenth century — provided it had arrived there, which the argument of this essay supports as structurally probable.

Source: Engnald, David Lange (egnald), "Chakte Viga — a very colorful wood," discussion thread on penturners.org, 28 August 2020, URL: penturners.org/threads/chakte-viga-a-very-colorful-wood.166628/.

The material properties and commercial ambiguities described so far only take on their full meaning within the older history of European bow-makers' supply chains. The plausible integration of Mexican timbers such as C. platyloba presupposes a commercial, technical, and nomenclatural infrastructure already in place, formed as early as the eighteenth century around brazilin-bearing woods.

The Supply Chain before Pernambuco: from Snakewood to Pernambuco

To understand how the export of these woods from Mexico fits into a longer trajectory, we must go back a century. European bow-making workshops did not begin importing tropical wood with Tourte. Well before him, they were already sourcing dense New World timber, in particular snakewood (Brosimum guianense), also known as amourette, letterwood, or leopardwood. This species, native to the Guianas, Suriname, and northern Brazil, extending as far as southern Mexico, was feeding European workshops from the seventeenth century onwards. The commercial supply chain for bow wood thus long predated pernambuco: when the latter established itself at the end of the eighteenth century, it did so within an already well-worn supply network, through the same ports, the same intermediaries, and often the same vessels.

Two primary sources, identified by Dr John Basford, seal this point. The first is the Encyclopédie of Diderot and d'Alembert: at the article "Violon" (1765), published barely a decade before Tourte's first experiments, bow wood is said to be "ordinarily bois de la Chine, although any other that has the necessary strength is equally suited to this use." The formulation is doubly revealing: it establishes that the French standard for pre-Tourte bow-making was indeed snakewood ("bois de la Chine"), and it shows that makers already reasoned in terms of performance — "any other that has the necessary strength" — not species. The taxonomy of performance is here stated word for word, a generation before the modern bow.

The second source is its mirror image. Basford mentions an English viol bow of around 1750, made from pernambuco but painted with black spots to imitate snakewood. This detail is precious: it reveals that in the eighteenth century, snakewood was the cultural and aesthetic standard, while pernambuco was then regarded as an ordinary wood that had to be disguised to pass for something nobler. This is the exact reverse of what would be observed a century and a half later at Mirecourt, where cheap woods would be stained to resemble pernambuco, which had in turn become the reference. The direction of the disguise is inverted — proof that these hierarchies rest on shifting cultural conventions, not on some fixed botanical truth.

The transition from snakewood to pernambuco as the reference wood for modern bow-making is therefore not a rupture in commercial practice: it is a substitution within a pre-existing network. When François Xavier Tourte adopted pernambuco in the 1770s–1800s, he did not build a new supply chain; he redirected an already active one towards a species with mechanical properties better suited to the longer bow. Density alone does not explain this choice: bow pernambuco typically ranges around 0.90 to 1.10 g/cm³, while snakewood is, in that respect, even denser — often between 1.05 and 1.25 g/cm³.

It is precisely this excess of density that posed a problem in Tourte's development of a taller, more verticalised head, allowing the use of a wider ribbon and a longer stick. In such a configuration, carving so voluminous a head in a wood as heavy as amourette tends to shift the centre of gravity excessively towards the tip. The particular combination of density and stiffness of pernambuco appears to have resolved this constraint, making it possible to sculpt the modern head and lengthen the stick while preserving balance in the hand.

Added to this is a better-balanced internal damping producing the singing tone sought rather than an overly dry response — a dimension that contemporary research is beginning to link to the wood's own chemistry: according to Matsunaga et al. (2000), cited by Dapson & Bain (2015), impregnating spruce with pernambuco extracts containing brazilin would produce a significant decrease in the damping coefficient, suggesting that the pigment compounds participate in the acoustic properties. This chemical contribution is consistent with the broader bow-wood literature: Matsunaga et al. (1996) found the loss coefficient (tan δ) of pernambuco to be the lowest among the species they tested and attributed it to the wood's high content of extractives — the very dye compounds prized by the colourist — and a companion study comparing pernambuco with candidate substitutes reached parallel conclusions (Matsunaga and Minato 1998). What made pernambuco an excellent dye — the density and chemistry of its heartwood — would thus also contribute to what makes it an excellent bow wood. One may further add a remarkable stability of camber: pernambuco accepts heat-bending of the modern concave curve and tends to retain this curve durably under the stresses of playing. Snakewood, more brittle and less balanced in its damping, seems by contrast to tolerate this type of work less well over time. It is the combination of these properties — and not density alone — that appears to have favoured Tourte's choice of pernambuco, while the substitute woods of subsequent centuries (massaranduba, "bois de fer," "bois d'abeille") reproduced only imperfectly its mechanical balance.

An archival document nonetheless illuminates the continuation of older species at the very moment of the transition to pernambuco. An autograph receipt by Henry Tourte (Paris, 13 December 1825), signed "for my grandfather Tourte jeune," attests to the delivery to Baron de Tremont of five round-stick bows with plain frogs, divided across three species: three in Bois de Brésil (one bass and two violins), one violin in Bois de Corail, and a last violin in Bois de la Chine (source: Childs, Paul, François Tourte, Bowmaker).

This document is doubly precious. On the one hand, it shows that in 1825 — at the height of pernambuco's consecration — the Tourte workshop was still delivering, on the same order, a bow in the very wood of the pre-Tourte supply chain: for the "bois de la Chine" of the receipt in no way designates a Far Eastern wood. The Dictionnaire de Trévoux (1771) gives the exact definition: "Bois de la Chine... que les Hollandois appellent Letterhout, qui ne croît en aucun autre lieu du monde que dans le continent de Guyane" — that is, letterwood or Brosimum guianense, exactly the snakewood / amourette discussed above. The 1825 receipt thus captures substitution in action: the old species (amourette) and the new (pernambuco) coexist on a single invoice, under commercial names that refer to no taxonomy. (It may be noted that the French edition of Childs preserves the literal term of the receipt, "bois de la Chine," while the English edition substitutes the modern commercial name of the same wood, amourette: both readings are correct, and their divergence is itself a miniature instance of the taxonomy of performance this essay describes.)

It is in this sense that the Parisian workshop of the early nineteenth century functioned as a genuine empirical laboratory: everything that colonial ships unloaded that was heavy, dense, and colourful was put to the test. The "corail" (coral wood), according to the identification proposed by the xylologist Pierre Détienne (CIRAD-Forêt, 2002) on the basis of Roubo's descriptions (1774), would have been provided by large, old trees of Pterocarpus officinalis Jacq. or P. rohrii Vahl (Fabaceae) from the Antilles — with red, sometimes interlocked-grain heartwood — a species subsequently abandoned because of its porosity and difficult behaviour under tools. This identification, made by a contemporary specialist in tropical wood anatomy, illustrates the exercise of historical reconstruction that this article proposes for pernambuco: a commercial name designating in reality several species, fixed after the fact by anatomical examination.

The observation is identical for the other great classic of historical bow-making: "bois de fer" (ironwood). Botanically, ironwood does not exist. This catch-all term covered dozens of South American species with a density greater than water (boco, wamara, pau ferro, etc.). The nomenclature of historical bow-making is thus a nomenclature of use and sense: "bois de fer" named hardness, "bois d'abeille" named an unresolved sensory property — colour, scent, or nectar-bearing flowers — "corail" named the visual appearance, and "bois de brésil" named the chemical yield in the dyers' vat. At no point did this nomenclature concern itself with botanical taxonomy.

The Story of the Sugar Crates: apocryphal but revealing

A celebrated anecdote in the bow-making world deserves careful examination, for its partial truth perfectly illustrates the point at hand. According to a well-established oral tradition, Tourte or his father Nicolas Pierre discovered pernambuco not at an exotic timber merchant's, but on the Paris docks, by reclaiming packing crates for sugar, tobacco, or dyestuffs arriving from the Americas. Pernambuco was indeed massively used to make such crates, because of its hardness and antimicrobial properties. This story is dismissed as apocryphal by some luthiers: Dr John Basford — luthier, bow-maker, and restorer since the mid-1980s — notes that the wood actually used for such crates was often Couratari, not pernambuco, chosen for its impermeability; recent studies on colonial packaging (Bernal, Valente and Pissarra) confirm this. But its symbolic truth is entire: pernambuco entered the bow-maker's workshop through the service entrance of the dyeing and colonial supply chain, not through a deliberate process of botanical selection. The modern bow was born of a repurposing: it is fashioned from a raw material whose original vocation was textile dyeing, not instrument-making.

The Tubbs family in England — who were experimenting with pernambuco for bows at the same period as Tourte in France — were previously silk weavers, and therefore knew dyewood not as a luthiery material but as an industrial input. The road from dyewood to the concert bow passes through the same quays, the same warehouses, and the same commercial actors as the road from dyewood to the dyer's vat.

A remarkable continuity emerges: European bow-making workshops sourced dense tropical timbers from Central and South America in a near-unbroken succession from the seventeenth century — first snakewood, then pernambuco recovered from dyeing and colonial supply chains, then massaranduba and other Caesalpinioideae — all under changing commercial appellations and without systematic botanical traceability at any point in this chain. The "bois de brésil" that Tourte ordered, the "palo de brasil" exported from Mazatlán in the nineteenth century, and the "bois d'abeille" of Mirecourt workshops in the twentieth century are not three separate histories. They are three chapters of the same commercial narrative, structured by the same logic: find in the tropical forests of the New World the dense, resilient wood that the European market demands, under the name that market is prepared to buy.

This continuity also corrects a common framing — repeated, for instance, by Aniano (2010) — whereby pernambuco became a bow wood only after the mid-nineteenth century, once it had ceased to serve the dyer. Tourte's adoption of the wood around 1775, in the midst of a still-thriving dye trade (Dapson and Bain 2015), shows that bow-making drew on the same live commercial pool concurrently, not on its exhausted residue.

The Mexican Pacific was not, moreover, the only source of pernambuco substitutes feeding the European trade in the nineteenth century. A second supply chain, geographically distinct but commercially parallel, was structured around the Caribbean — Haiti above all, but also the Bahamas, Cuba, and the Venezuelan coast. French customs statistics for 1834 record a considerable volume of exotic wood from Haiti (approximately 314 tonnes), a significant portion of which belonged to the red dyewood trade. Guillaumin (1859) confirms this explicitly in the article "brésillet": "Le gros brésillet... vient principalement d'Haïti. Ses bûches ont de 1 à 2 mètres de long, sur 5 à 10 décimètres de diamètre, et elles pèsent de 2 à 4 kilog." Détienne (2002), drawing on the descriptions of Roubo (1774), identifies the probable Caribbean species: Caesalpinia brasiliensis L. (which grows in Haiti, not Brazil — the Linnaean binomial is itself geographically erroneous), Caesalpinia bahamensis Lam. (Bahamas and Cuba), and possibly Caesalpinia granadillo Pitt. from the Venezuelan coast. These species, related to the Brazilian Caesalpinia, produced a dense red wood sharing the expected dyeing properties, and thus entered naturally into the commercial category of "bois de Brésil" — literally named brasiliensis, even though they did not come from Brazil.

This chronology makes the place of Caesalpinia platyloba easier to understand. If European bow-making workshops were already sourcing dense tropical wood from the New World as early as the seventeenth century, and if these same networks subsequently channelled Brazilian pernambuco — sometimes recovered from dyeing and colonial chains without precise botanical identification — then the relevant question shifts. C. platyloba grows in the same dry forests of the Mexican Pacific as H. brasiletto, whose export is attested. It produces a dense red-orange wood with comparable mechanical properties. It was available in the same basins. And the intermediaries who loaded these cargoes had neither the tools, the obligation, nor the economic incentive to distinguish two dense red woods at the cut. The Mexican supply chain to European bow-making does not begin with pernambuco: it predates it, with snakewood, and survives it, with massaranduba. C. platyloba had only to be in the right place at the right time — which, geographically and ecologically, was precisely the case. Under these conditions, its inclusion in these flows is at least as plausible as its exclusion. No archival evidence settles the question in either direction; what the commercial structure establishes is the plausibility of inclusion, not its occurrence.

The Anatomy of a Commercial Name: the Documented Case of "Bois d'Abeille"

Let us now turn to a substitution that is not inferred but attested by the archives. "Bois d'abeille" is not a botanical species; it is a commercial and vernacular name used in European bow-making, and especially at Mirecourt, to designate a group of ultra-dense tropical South American species employed as substitutes for student bows.

The principal species concealed behind this label is massaranduba (Manilkara bidentata, family Sapotaceae), as well as other species of the genus Manilkara. The etymology of the name remains to this day unresolved. The only direct source available in the forestry literature is Bruleaux (1989), who reports that Guianese cabinetmakers "called [balata/massaranduba] bois abeille because of its beautiful red colour" — an explanation linking the name to visual appearance rather than to any olfactory or gustatory characteristic. Several complementary hypotheses deserve mention without any of them being resolvable on the basis of known sources: the tree's white, sweet sap, documented as early as 1867 by Soubeiran and Delondre who note that massaranduba produces "a sap of a very white and very savoury colour"; the highly nectariferous flowers of certain Sapotaceae, capable of attracting bees; or an origin in an Amerindian vernacular term whose exact meaning was approximated. The parallel with the English name for the same wood, bulletwood — given, according to sources, either because the wood is "hard as a bullet" or because such was the local populations' term — illustrates how these folk etymologies stratify several competing logics without any one prevailing. It suffices to note that the name is sensory or poetic, purged of all taxonomic information.^[5]

The existence and durability of this category are solidly attested by French auction records, which explicitly document pieces such as "baguette en bois d'abeille verni teinté, travail ordinaire de Mirecourt vers 1920" or "archets de violon en bois d'abeille de l'école de Mirecourt." These recurring mentions in antique instrument sale catalogues prove that the term is an established historical commercial marker, not an isolated case; the manufacture of Mirecourt bows in massaranduba is moreover documented through to the 1980s, proof that this nomenclatural practice was maintained well beyond the industrial era of the nineteenth century. Rather than honestly labelling the material "massaranduba," the trade settled on a poetic appellation that dilutes the information all the way to the final buyer: the traceability break is consummated at the moment the material enters the chain. This is the substitution mechanism described in this essay — in action, no longer in hypothesis.

This category was not confined to anonymous student production. Aniano (2010) reports anecdotal evidence that two leading bow-makers of the late nineteenth and early twentieth centuries — Charles Peccatte and Émile-François Ouchard — each appear to have kept a quantity of massaranduba (Manilkara bidentata) in their workshop stock. The testimony is anecdotal and should be treated as such, but it is a telling indication that the material reached the bench of named masters, and not only the production lines of Mirecourt.

The Alcohol-Cotton Test: an Index of Chromatic Malleability

Every restorer who has cleaned a Mirecourt bow (1900–1950) has made this observation at least once: at the touch of an alcohol-dampened swab, the stick "bleeds." What is revealed most often is a cosmetic dye applied to mask too pale a wood or wood defects.

The simple recourse to this dyeing proves a decisive point: had the wood natively possessed the dark red-brown colour of canonical pernambuco, it would not have needed to be stained. Chromatic disguise presupposes an underlying wood that does not spontaneously possess the expected appearance. This observation is compatible with two hypotheses, and only two: either it is a pale-morphotype Paubrasilia echinata (the laranja morphotype is attested), or it is another Caesalpinioideae with paler wood integrated into the supply chain. In both cases the conclusion is the same: what the bow-maker and the final buyer validated under the name "pernambuco" was not a biological identity, but a set of visual and mechanical properties that was constructed — including, on occasion, through chemical intervention. The colour of pernambuco in the industrial bow-making of the early twentieth century had become a cultural code applied to a material reality more diverse than the naked eye alone can detect.

Engnald's experiment described above further confirms that alcohol is a particularly effective extractor of Caesalpinioideae pigments.

Selection by Density

The myth of the craftsman sovereignly selecting his wood at source deserves to be dismantled. Parisian "haute archèterie" of the nineteenth century was entirely dependent on the catalogues of exotic timber and dyestuff commission merchants. On the docks, wood was not evaluated by a botanical manual but by empirical performance criteria: intensity of red at the cut, density (logs saturated with pigments and resins that sank immediately), presumed brazilin yield. These criteria, replicated identically by the industrial chemists of the time, underpinned a rigorous but taxonomically blind price hierarchy. As Jean-Pierre Girardin explains in the fourth edition of his Leçons de chimie élémentaire appliquée aux arts industriels (1860), the commercial red woods are classified by their brazilin content, itself correlated with the density of the heartwood; pernambuco, the hardest and densest, is the benchmark, while the woods of Sainte-Marthe and Mexico are described as poorer in colouring agents, paler and less dense.

The Dictionnaire universel théorique et pratique du commerce et de la navigation (Guillaumin et Cie, eds., 1859) gives the explicit price scale for the 1850s, under the entry "Brésil (Bois de)":

« Le prix du bois de Pernambouc varie de 120 à 150 fr. les 100 kilogr. ; celui de Sainte-Marthe de 50 à 70 fr. ; le Sappan de 30 à 45 fr. ; les bois des Antilles et du Mexique de 15 à 25 fr. » ["The price of Pernambuco wood varies from 120 to 150 fr. per 100 kg; that of Sainte-Marthe from 50 to 70 fr.; Sappan from 30 to 45 fr.; the woods of the Antilles and Mexico from 15 to 25 fr."] Guillaumin, Dictionnaire universel théorique et pratique du commerce et de la navigation, 1859, article "Brésil (Bois de)"

The ten-to-one spread between Brazilian "Premier Choix" and Mexican Pacific woods does not reflect a botanical judgement, but merchants' assessment of pigment concentration. And above all, the fact that these four categories are quoted within the same entry of the commercial dictionary — Pernambuco, Sainte-Marthe, Asian Sappan, woods of the Antilles and Mexico — directly confirms the thesis advanced here: the market of 1859 did not distinguish four separate trades, but four grades of a single commercial category of "red dyewood." Sappan (Caesalpinia sappan), an Asian wood with no botanical connection to Brazilian pernambuco, is treated by merchants as a simple lower-quality substitute, exactly like the Mexican woods (Haematoxylum brasiletto and, in all likelihood, Caesalpinia platyloba). This same price hierarchy appears, with local variations, in the contemporary commercial quotations of London and New York, confirming that this is not a French customs peculiarity but a global market structure.

French customs statistics confirm this substitution mechanism on a large scale. According to Guillaumin, in 1839 France imported approximately 875,000 kg of Fernambouc wood, valued at 1.80 fr. per kilogram, originating chiefly from Brazil, the Netherlands, and the Sardinian states. Five years later, in 1845, this figure had collapsed to 101,000 kg — a fall of roughly eight to one, reflecting the exhaustion of Brazil's coastal forests. Yet in the same interval, imports of sappan and Nicaragua wood, presented by Guillaumin as direct substitutes, rose from 496,000 kg to 740,000 kg. The market for "red dyewood" did not retreat: it recomposed its supply by replacing the failing Fernambouc with other brazilin-bearing species. Substitution is therefore not merely a theoretical commercial logic; it is measurable in the customs data.

In the same volume, Guillaumin explicitly documents the physical mechanism of this substitution. Regarding sappan, the author notes:

« On les substitue ou on les mêle souvent aux bûches de Fernambouc, qui sont d'un prix élevé. Cette fraude est facile à reconnaître par l'inspection des tranches : celles du sapan offrent au centre l'orifice d'un canal médullaire qui est très-apparent ; les bûches de Fernambouc, au contraire, sont dépourvues de moelle ou n'en ont qu'un filet presque capillaire. » ["They are often substituted for or mixed with Fernambouc logs, which command a high price. This fraud is easily recognised by inspection of the cross-sections: those of sappan show at the centre the opening of a pith canal that is very apparent; the logs of Fernambouc, on the contrary, are devoid of pith or have only an almost capillary thread."] Guillaumin, 1859

This precision has two consequences. On the one hand, the nineteenth-century trade did indeed possess an anatomical test capable of discriminating between sappan and Fernambouc on raw logs. On the other hand, the very existence of this test — and the fact that Guillaumin judges it useful to publish — attests that substitution was common, sometimes contested, and that at a high grade purchased at great cost, the confusion could be designated by contemporaries themselves as "fraud." The taxonomy of performance dominated ordinary commerce; fraud appears, in the sense contemporaries understood it, only at the transaction interfaces where a premium grade had been contracted for payment and was delivered in another species. This point does not contradict the general thesis: it defines its perimeter.

This legal limit of the notion of fraud finds a striking judicial illustration on the other side of the Atlantic. In 1804, a New York State court ruled in the case of Seixas and Seixas vs. Woods on a substitution of brazilleto (Brazilwood) by peachwood (Haematoxylum brasiletto) — two woods that the trade sometimes designated under neighbouring appellations. The court ruled that the seller, ignorant of the wood's true nature, had not knowingly deceived the buyer and was not held liable (as reported by Dapson & Bain, 2015). The case became a precedent for the caveat emptor rule — "let the buyer beware." This judgement is itself a confirmation of the thesis: confusion between related brazilin-bearing species was so deeply embedded in commercial practice that a 1804 court regarded it as a good-faith error, not a fraud.

The dockside timber pricing policy does not translate mechanically into the economics of bow-making. The prices of bows themselves, as documented by Paul Childs in his work on Tourte, paint a more complex picture than one might expect. The two surviving receipts from the Tourte–Tremont correspondence of December 1825 give the tariffs explicitly in francs: the receipt of 31 December 1825 records three plain violin bows at 24 francs each, a fourth plain violin bow at 36 francs, and a plain cello bow at 42 francs. Silver-mounted bows reached higher prices, and the most prestigious pieces — gold and tortoiseshell mounted — could reach 72 to 120 francs. These levels were themselves exceptional for the period: Tourte was one of the first bow-makers to succeed in selling bows at substantial prices, where most of his contemporaries and predecessors struggled to exceed a few francs per piece. It was in part Tourte himself who established the commercial possibility of a "haute archèterie."

The Mirecourt workshops, discussed above, did not truly consolidate until after Tourte — first in waves from the 1830s–1850s, then massively in the late nineteenth and early twentieth centuries. When this supply chain reached full scale, it produced bows in a range running from approximately 1.50 to 40 francs, below Tourte's tariff. But this is not, strictly speaking, a synchronic competition: Mirecourt occupies and organises a market segment that, at Tourte's time, did not yet exist as such — a segment characterised by relative standardisation, yield pressure, and a range segmentation running from top to bottom. Tourte established the summit; Mirecourt workshops, two or three generations later, deployed the volume beneath.

The second element to consider is the share of raw material in a bow's price. A bow stick consumed approximately one kilogram of raw wood once cutting waste was accounted for. At the 1859 "Premier Choix" Pernambuco price (1.50 francs per kilogram according to Guillaumin), this represented barely one and a half francs of wood per bow. It should be noted that these are wholesale dockside prices — primarily Bordeaux and Nantes for the French Atlantic coast, Amsterdam and Hamburg for the northern markets. Paris being no maritime port, the wood acquired by Tourte involved a second logistical segment, either by coastal cabotage then river haulage up the Seine, or by road via the Loire and the canal network. This additional journey was itself burdened, over the period 1793–1815, by the maritime wars with England, the Continental blockade, and the fragility of coastal links. The Parisian workshop price was therefore significantly higher than the wholesale port price. But even doubling or tripling the material cost per bow to account for this logistics, one still obtains a wood value of less than five francs per stick — meaning that for a plain violin bow sold at 24 francs, the material fraction was between one fifth and one quarter; for a 36-franc violin bow, approximately one eighth; and for the most prestigious gold-and-tortoiseshell pieces, barely a few per cent of the selling price. As in all luxury craftsmanship, the raw material occupied, in value, a marginal share as one moved up the range: what Tourte was selling was not pernambuco — it was labour, finish, and, as his reputation established itself, a name.

The economic conclusion is clear: neither Tourte in his lifetime, nor the regional workshops that succeeded him, had any need to purchase a wood fundamentally different from what circulated throughout the supply chain. They could perfectly well source from the same commercial pool — brazilin-bearing woods indiscriminately labelled "bois de Brésil," "sappan," "peach wood," or "palo de brasil" on the docks. What distinguishes a Tourte from an ordinary regional bow is not decided at the moment of raw-material purchase, but at the workbench.

It is there, at the workbench, that the central mechanism of this history plays out — the very one that allows an apparent paradox to be resolved. If substitution was structurally possible, how does one explain that the sticks of the great nineteenth-century bow-makers anatomically examined to date — Lupot, Grand Adam, Vuillaume, Sartory, and a Mirecourt bow of 1920 in Macedo et al. (2020) — are all identified as genuine Paubrasilia echinata? The Mexican case, where related species such as Caesalpinia platyloba could pass the workbench test without ever being named, already gives an intuition of the answer: it does not rest on any upstream commercial privilege, but on a sorting mechanism whose general formulation is developed below.

Two Sorting Mechanisms, One Pool of Wood

The apparent botanical homogeneity of elite Parisian production is not evidence against the substitution thesis — it is the product of severe filtering applied to a heterogeneous supply. The market for dense red wood in the nineteenth century operated through two distinct sorting mechanisms, both drawing on the same commercial pool of brazilin-bearing woods:

Upstream sorting is the kind Guillaumin documents: a price hierarchy constructed by commission merchants on the basis of observed density and intensity of red at the cut. This sorting never names species. The "Premier Choix" at 150 francs per 100 kg selected logs that statistically were more likely to be P. echinata, but could also be particularly dense sappan, or a superior-quality C. platyloba that had made it to the dockside.

Downstream sorting operates at the workbench, over weeks or months of work. Its severity varied from workshop to workshop: extreme at Tourte's, where it devoured the margin but produced pieces converging towards remarkable anatomical homogeneity; moderate in regional workshops concerned with moving their stock; minimal, finally, in certain Mirecourt production-line workshops after 1880, where yield took precedence over selection. The same log could be purchased by three different workshops and yield three bows of radically different quality, simply because the craft filter was applied with three different levels of rigour.

These two mechanisms are not in opposition: they are cumulative. But their relative importance is inverted as one moves up the quality hierarchy. At the bottom of the market, upstream sorting dominated (you got what you paid for); at the top, downstream sorting dominated (you rejected until only the excellent remained). One must be careful about what the anatomical literature allows us to assert today. The principal study available (Macedo et al., 2020) covers a sample of five historical French bows — a Lupot (1810), a Grand Adam (1840), a Vuillaume (1850), a Sartory (1890), and a Mirecourt bow of 1920 — all identified as genuine Paubrasilia echinata, anatomically assigned to the "arruda" morphotype from north-eastern Brazil (Rio Grande do Norte and Paraíba). The presence in this corpus of a Mirecourt bow of 1920 deserves emphasis: it indicates that at least part of Mirecourt production, even at a late date, was genuinely made in canonical pernambuco. It must be borne in mind, however, that a sample of five sticks cannot be representative of a production of several hundred thousand bows over a century and a half. To our knowledge, no systematic anatomical study has been conducted on a large sample of the lower segments of Mirecourt production — the production-line bows in the 1.50-to-10-franc range where yield pressure was greatest. If bows in bois d'abeille, amourette, or visually identifiable exotic woods are set aside, a portion of this production presents woods visually classed as "pernambuco" but of mediocre quality, often more porous. Are these geographical variants of P. echinata, or related species accepted into the supply chain? The question remains open. The framework proposed here predicts that greater botanical heterogeneity would be found there than at the top: this is an inference from the two-mechanism sorting model, which is to date neither refuted nor empirically confirmed at large scale. For the bow-maker in practice, this presumed asymmetry has a concrete translation: as one moves up the range, it is not the supplier who becomes more rigorous — it is the workshop that becomes more demanding about what it will accept to transform into a bow sold under its name.

The AOC: the Modern Answer that Reveals, a contrario, a Historically Insoluble Problem

The best analytical tool for measuring the scale of this historical indifference to taxonomic precision is perhaps, paradoxically, a tool of the present: Appellation d'Origine Contrôlée (AOC) systems and, more broadly, modern raw-material traceability mechanisms.

AOC systems for olive oil, cheeses, wines, and honeys were built precisely in the twentieth century because the market's spontaneous traceability was insufficient. These systems, today solidly institutionalised, are regulatory responses to a structural market failure: the inability of economic actors to guarantee, without a binding mechanism, the authenticity of a product's origin.

Yet even with these systems in place, AOC fraud remains massive and regular. Extra-virgin olive oil is one of the most adulterated food products in the world: oils of lesser quality or undisclosed origin are routinely blended and marketed under protected labels. Honeys, PDO cheeses, and even some wines are subject to documented large-scale adulteration, despite institutional controls, chemical analyses, and criminal sanctions.

The historiographical lesson is clear: if fraud is endemic despite traceability, what must we conclude about the state of commercial exchange in an era when traceability simply did not exist?

For tropical timbers, certification systems (FSC, CITES, etc.) were only introduced in the second half of the twentieth century, and their real-world effectiveness remains deeply debated. There exists, to this day, no true equivalent of the AOC for forest species.

In this context, claiming that in the nineteenth century the cargoes of "palo de brasil" exported from Mexican Pacific ports contained botanically verified and homogeneous species is not a cautious hypothesis — it is a methodological anachronism.

The Twentieth Century: from the Dye Vat to the Instrument-maker's Workshop

The advent of aniline-based synthetic dyes at the end of the nineteenth century swept away the international dyewood trade. In the twentieth century, the trajectory of Caesalpinia platyloba repositioned itself towards the exploitation of its remarkable mechanical properties and acoustic qualities appreciated by some luthiers.

Structural Resistance and Local Uses

Endowed with high density and exceptional resistance to decomposition and wood-boring insects, the wood became a material of choice at regional scale for durable fence posts and agricultural infrastructure in Mexico, with posts reported to remain serviceable in the ground for more than a century. The mechanical properties of Chakté-viga, characterised by ITTO project PD 385/05 Rev. 4 (Silva Guzmán et al., 2012; density 0.891–0.958–1.014 g/cm³), place it well within the density range documented for bow-making pernambuco (0.9–1.2 g/cm³; Brémaud, 2010), although somewhat below the densities generally associated with the most highly prized modern bow wood.

Beyond its mechanical characteristics, the ITTO programme produced another observation of direct relevance to the present argument. Two logs supplied by local ejidos under the single vernacular name Chakté-viga proved, upon anatomical examination, to belong to two distinct Caesalpinia species (C. cf. platyloba and an undetermined Caesalpinia sp.). The two woods were macroscopically almost indistinguishable yet differed markedly in the ultraviolet fluorescence of their aqueous extracts. The pattern traced throughout this essay—a single commercial or vernacular designation encompassing more than one taxon—is therefore not merely a historical reconstruction. It can be observed directly under conditions of modern, state-supervised sourcing.

The same research programme also encountered a dynamic strikingly reminiscent of earlier brazilwood booms. According to H.-G. Richter (personal communication, May 2026), researchers returning to the Yucatán around 2010 to obtain additional material were unable to secure further specimens from local ejidos, whose members preferred more lucrative export sales to Chinese buyers. The underlying economic logic of the historical palo de brasil trade thus remains recognisable; only the destination markets have changed.

The Luthiery Niche: an Ambiguity that Regulation Seeks to Resolve

In the second half of the twentieth century, faced with the scarcity of traditional precious woods, C. platyloba gradually found a place on the international speciality timber market under the commercial names Chakté Viga or Paela. Its integration into the world of instrument-making reveals several market dynamics, noticeably different depending on the craft community targeted.

On one side, guitar-makers integrated this species in a relatively open and documented manner. Appreciated by some luthiers for its stability, acoustic properties, and shimmering colour, Chakté Viga is explicitly named in lutherie timber supplier catalogues and used notably for fingerboards and, more recently, for certain guitar backs and sides. Here, commercial traceability, however modest, assumes the species' identity.

A second segment, equally important to recognise, concerns artisanal bow-making workshops — today mostly independent or organised in small structures — that strive to source pernambuco through documented channels. The principal legally available resource remains pre-CITES stock, that is, wood acquired before the listing of Paubrasilia echinata in Appendix II on 13 September 2007. The authentication of these stocks rests, to date, on chains that are essentially declaratory and documentary rather than on systematic analytical verification — as the CITES Secretariat explicitly acknowledged in its preparatory report to CoP20 (Fine tuning traceability solutions, 2025).

This structural fragility reached a peak at CoP20 in Samarkand (24 November – 5 December 2025), where Brazil, through Proposal 46, requested the uplisting of pernambuco to Appendix I of the Convention — which would have prohibited all international commerce, including finished bows. This proposal was withdrawn at the very last moment thanks to the coordinated intervention of a delegation of bow-makers (IPCI France-Europe, EILA, CSFI), in favour of a compromise adopted by consensus on 5 December 2025. Annotation #10 was substantially amended and entered into force on 5 March 2026: the general exemption that finished bows had enjoyed in international commerce is removed, and only non-commercial movements (concerts, loans, teaching, expertise, repair, without transfer of ownership) remain exempt. Any cross-border change of ownership (sale, succession, inheritance outside the state of residence) will henceforth be subject to a CITES permit — except between European Union member states, which constitute a single Party.

This episode is significant for the thesis advanced here. The Parties to CoP20 have, through Decisions 20.239–20.243, tasked the CITES Secretariat with analysing, comparing, and developing — over three years, with a view to CoP21 planned for Panama in 2028 — the traceability mechanisms applicable to pernambuco. In other words, in December 2025, 185 sovereign states officially recognised that no robust traceability system yet existed for a species that had been listed under CITES for 18 years. The central argument of this essay — namely that botanical traceability is not a spontaneous property of the market and must be deliberately constructed — is thus supported not by historical deduction alone, but by a contemporary diplomatic decision. The artisanal bow-makers who already operate today within a scrupulous documentary framework do not contradict this thesis: they are, on the contrary, the minority actors who are anticipating the system that the international community is attempting to build.

The picture changes completely in industrial bow-making — understood here as the flows of mass production and low-cost importation, distinct from contemporary French artisanal workshops — where the commercial power and historical prestige of the word "pernambuco" have eclipsed the botanical reality. On this market, introducing a name like Coulteria platyloba would be a commercial disadvantage; so ambiguity settles in through attrition along the chain. A wholesaler may market student bows with a cautious phrase — "wood close to pernambuco" — but this semantic precaution fades in the transition from wholesale to retail: the final reseller, facing a clientele that demands "pernambuco" for reasons of prestige, rarely passes on the nuance, and the "close to" becomes "genuine" in the buyer's mind. At both ends of this market — from bulk import to direct e-commerce — botanical traceability between the forest and the bow remains structurally deficient, with visual performance and the commercial label taking precedence over species identity. Two well-documented contemporary cases suffice to demonstrate this.

The Contemporary Market: the Emergence of "Caribbean Pernambuco"

A particularly clear example of this persistent taxonomic malleability appears today in the catalogues of the main European suppliers of exotic woods for lutherie. In 2026, the German wholesaler Espen markets prominently bow blanks sold under the appellation "Caribbean Pernambuco." Botanically, this appellation is a commercial fiction: these are in all likelihood related Central American species (probably Caesalpinia violacea or C. velutina), without the supplier specifying the exact taxonomy.

Yet modern acoustic tests are unambiguous — up to a point. These blanks commonly display Lucchi stiffness-tester scores above 5000, even 5500 m/s, placing them at the very top of professional bow-making requirements. But Lucchi velocity must not be confused with acoustic equivalence. The stiffness tester measures the velocity of sound propagation in the wood, from which the stiffness-to-mass ratio (specific modulus) is derived: a necessary property, but not a sufficient one. True Paubrasilia echinata also possesses a very particular viscoelastic damping profile, which master bow-makers prize above all other characteristics — a property quantified by Matsunaga et al. (1996), whose measurements place pernambuco's damping coefficient below that of every alternative tested (see also Brémaud 2010). Woods such as Chakté Viga, massaranduba, or certain Caribbean Caesalpinioideae can equal or surpass pernambuco in Lucchi velocity while feeling subtly "dead," "brittle," or too rigid in the hand — precisely because their internal damping differs. They share its density and modulus of elasticity without reproducing its full mechanical signature. This is what makes the following figure eloquent: at a rigorously equal Lucchi score, a "Caribbean Pernambuco" blank (Lucchi 5100–5199) sells for €39 at Espen, against €135 for a "PRE-CITES Brazilian Pernambuco" blank of the same score — a ratio of 1 to 3.5. The comparison is probative here, where a simple catalogue price gap would not be, because the measured performance is held constant: what the market pays extra is not the score, but the residual uncertainty about viscoelastic behaviour that the score cannot capture — and the name that guarantees it.

The configuration here is close to that of the nineteenth century, with one important difference. In 1859, merchants confused taxa under a single name ("bois de Brésil") without geographical qualification, and substitution operated invisibly. Today, the label "Caribbean Pernambuco" is geographically transparent (it explicitly names a non-Brazilian origin) while remaining botanically opaque (it specifies no species). This shift is not accidental: by adding a geographical modifier, the supplier legally circumvents the CITES restrictions targeting Paubrasilia echinata endemic to Brazil, while exploiting the same mechanism of psychological and acoustic substitution that has structured the dyewood and bow-wood market for centuries. Yesterday, semantic ambiguity served to palliate supply disruptions while satisfying technical demand; today it fulfils the same technical function while exploiting a regulatory exemption. The form changes with the centuries; the structure does not.

Source: Espen Tonholz/Tonewood (shop.espen.de), product listing "Bow Blank Violin Caribbean Pernambuco Lucchi 5100–5199" (ref. KPN30304), consulted May 2026.

"Mexican Pernambuco": Substitution on the Finished Bow

The same nomenclatural slippage is observed with even greater acuity, and direct economic consequences, on the market for finished bows — no longer the raw blank, but the finished object sold to the musician. Where the guitar-maker frankly names Chakté Viga, commercial bow-making, as we have seen, tends instead to make it disappear under a nobler appellation; the case below presents this in its most developed form. It reveals a double labelling that exposes the Mexican supply chain, and a divergence of commercial strategy that constitutes, in real time, a case study of the thesis advanced here.

On one side, student bows are marketed by the French importer Sebim — a house whose sourcing is substantially Asian, the blanks being shaped in China from wood acquired in Germany and the Netherlands (information communicated by Sebim to the author, May 2026) — under frank botanical appellations: a bow in Chakte Viga (Caesalpinia platyloba, now Coulteria platyloba) at around 250 euros, and a bow in Coulteria sp. at around 300 euros.^[7] This last appellation, which names the genus without specifying the species, is the one the Chinese manufacturer itself uses on its invoices and customs declarations — and which Sebim has preserved rather than translating it into a more flattering commercial label. On the other side, higher-range bows, also cut from a Mexican wood and signed "M. Pereira" (made in Portugal), are offered under the appellation "Mexican pernambuco" at prices ranging from 1,400 to 3,200 dollars — sold, moreover, as "CITES approved."

What gives this juxtaposition particular acuity is the recent evolution of Sebim's commercial policy. Since March 2026, the importer has made the explicit decision to name the species of its student bows without resorting to appellations of the type "pseudo-pernambuco," "close to pernambuco," or "Mexican pernambuco" — precisely in order to avoid customs difficulties that these ambiguous formulations could provoke (information communicated by Sebim to the author, May 2026). The choice is therefore both ethical and pragmatic: botanical transparency combined with anticipation of the regulatory risks linked to CITES.

We thus find ourselves before a remarkable case: two retailers facing the same material — a dense Mexican wood with acoustic properties comparable to pernambuco —, two different target markets, and two strictly opposed nomenclatural strategies. On Sebim's side, botanical transparency was introduced upstream, at the Chinese manufacturer itself, whose customs documents carry the botanical appellation without embellishment; Sebim maintained it rather than replacing it with a more commercial denomination. On the distributors of M. Pereira bows, the geographically modified prestige appellation is maintained. This is not merely a marketing choice: it is a revealing instance of the tension — never resolved since Pomet (1694) — between naming by performance and naming by taxon. The divergence of 2026 illustrates that this tension is still active, and that the market has still not resolved it — it has simply segmented the response according to the distribution circuit.

Note on the photomontage (Figure 27): five of the six bows reproduced were photographed directly by the author. The sole exception is the "Mexican pernambuco" bow signed M. Pereira, whose photograph is taken from the Fiddlershop product listing (https://fiddlershop.com/products/arcos-lusitania-silver-special-select-mexican-pernambuco-violin-bow, consulted May 2026), reproduced courtesy of Fiddlershop / Joe Adkins, with permission.

This contemporary case offers a real-time demonstration of the mechanics studied in this essay. A Mexican wood accesses two very different markets depending on the name it bears: under the frank botanical appellation "Coulteria sp.," it remains confined to the student bow; under the name "Mexican pernambuco," it accesses the professional-range bow market. One must guard against attributing the price gap between the two to the name alone: it also rests on execution quality, mounting, and distribution channel — semi-artisanal in one case, industrial or imported in the other — factors that this comparison does not control. The point that remains, and that suffices for the argument, lies elsewhere: it is the appellation "pernambuco," and not the actual botanical identity of the wood, that opens the door of the premium segment to the material and reassures the musician. One further contresens must be avoided — a contresens that is the very hinge of the argument. The expression "Mexican pernambuco" is neither an oxymoron nor a geographical absurdity: it is the logical outcome of the taxonomy of performance. If "pernambuco" names a material behaviour and not an origin — the thesis this essay defends from beginning to end — then a pernambuco "from Mexico" is perfectly conceivable, and that is indeed how the market understands it. The term nonetheless continues to carry, beneath the surface, its charge of prestige — the idea of "real" Brazilian pernambuco — and it is this residual connotative claim to authenticity, more than the measurable performance of the wood, that grounds the properly symbolic part of its value. The word thus operates on two simultaneous registers: detached enough from its geographical origin for "from Mexico" to be appended without shocking anyone, but freighted enough with history to stand, on its own, as a selling argument.

It remains to be asked what "Mexican pernambuco" covers, botanically. The answer is illuminating precisely because there is no single one. In preparing this study, the author had initially identified these blanks as Coulteria platyloba (Chakté Viga) — an identification unambiguously supported by several speciality timber suppliers who explicitly sell Chakté Viga under the mention "also known as Mexican Pernambuco" (Woodpeckers; Savage Woods, which gives "Caesalpinia platyloba, also known as Mexican Pernambuco, Paela"). But another, equally established, commercial source describes its M. Pereira "Mexican Pernambuco" bow as cut from logwood — Haematoxylum campechianum — specifying that "logwood is known to some as 'Mexican pernambuco'" (J.R. Judd Violins). Yet logwood is not a brazilin-bearing wood: it is the haematoxylin species, the blue-black dye that this essay placed from the outset as a "commercial neighbour but chemically distinct" from Brazilwood. The same commercial name thus covers, depending on the supplier, two different botanical genera, one of which does not even belong to the red dyeing chemistry from which "pernambuco" historically derives its meaning.

This hesitation — the author's own, initially — is not a defect of the research: it is its clearest result. When an author devoting an entire essay to denouncing taxonomic confusion is himself caught out, it is because the label has perfectly fulfilled its function: "Mexican pernambuco" designates no stable species, but a promise of performance and prestige under which a brazilin-bearing Caesalpinioideae or a haematoxylin wood can pass indifferently. The market of 2026 reproduces exactly the gesture of Pomet in 1694: placing under a single name woods that botany separates. The taxonomy of performance is not an object of history; it is verifiable, intact, in an online shopping basket.

Yesterday, this substitution operated invisibly on the docks, under the generic appellation palo de brasil; today, with CITES circumvention an added concern, the Mexican supply chain displays itself geographically, while continuing to invoke the royal appellation to justify its price and reassure the musician.

The Experience of Artisan Bow-makers

An experienced bow-maker will legitimately object that he recognises pernambuco by hand — by its density, its elasticity, its response to heat-bending, and its sonority. This workshop knowledge is real and has constituted the basis of craft wood selection since Tourte. But it is necessary to measure precisely what this knowledge authenticates and what it does not.

If modern laboratories today have formal methods for distinguishing these closely related species — Raman spectroscopy, HPLC-MS, anatomical microscopy (see Appendix 2) — their application to the certification of a finished bow remains in practice very limited. Some techniques require micro-destructive sampling, difficult to accept on a valuable piece, while non-invasive methods find their results complicated by the varnishes, oils, and contamination accumulated over decades. The laboratory can sometimes resolve what the eye and hand reach the limits of taxonomically — but often at a level of intervention incompatible with the conservation requirements of a bow signed by a master bow-maker.

The bow-maker's touch and ear identify a profile of mechanical and acoustic properties compatible with use. This is not, strictly speaking, a taxonomic identification. The bow-maker validates a performance, not a species. It is important to do justice to the depth of craft expertise: a master bow-maker does not merely assess density and colour — Paubrasilia echinata carries distinctive anatomical signatures (notably the storied rays that produce the characteristic moire markings on flatsawn surfaces) and presents under the plane or scraper a particular behaviour that a practised hand knows how to recognise. These tactile indices are real, and they constitute a form of non-verbal, phenotypic knowledge, inherited and refined through generations of workshop practice; but it remains a qualitative classification a posteriori on a sample, not a botanical identification a priori.

The nineteenth-century bow-maker did not individually sort logs in a tropical forest. He ordered planks — later raw blanks — often by the dozen or by the hundred, on the basis of the commercial classification made by his supplier. He discovered the true properties of each piece only after several weeks or months, at the workbench, as he began to work it. What this manual contact then revealed was binary and qualitative: this is good wood, or this piece is worthless. Rejected pieces were either reworked into lesser-quality bows, or discarded. This recognition is real, expert, and refined — but it is a qualitative classification a posteriori on a sample, not a botanical identification a priori. A piece of Caesalpinia sappan or C. platyloba sufficiently dense and well-grained to pass this test would have been retained and used; a P. echinata of aberrant morphotype might, conversely, have been discarded as "bad pernambuco." The workbench test is thus richer than a simple mechanical measurement, but it remains exactly what its name indicates: a performance test at the bench.

This observation opens a strong hypothesis concerning the informal category of "bad pernambuco" that bow-makers themselves recognise: some of these pieces marketed in good faith as Paubrasilia echinata but presenting atypical characteristics could, in certain cases, not belong to this species at all. The detailed anatomical analysis of this hypothesis is developed in Appendix 2.

There is a second reality, still more revealing, that works in the opposite direction. A wood whose DNA certifiably and irrefutably establishes it as genuine Paubrasilia echinata can nonetheless prove mediocre for the bow. If it grew too rapidly (producing wide growth rings), if it presents cross-grain or a twist in the grain, it will fail under the bow-maker's plane, regardless of its perfect taxonomic nobility. This is where the thesis of this essay finds its most complete confirmation: the workbench judges by performance, not by taxonomy — even when the species is the genuine one.^[6] Far from invalidating the expertise of bow-makers, this replaces it in its exact epistemic framework: a system of validation by performance, inherited from an era when performance was precisely the only available criterion for evaluating materials (that is, in the mode of knowledge proper to the workshop).

The Fétique case is not isolated. Comparable observations can be formulated regarding certain bows of Émile Ouchard — several datable examples from around 1935–1940 present, on visual inspection, woods noticeably paler than those associated with his canonical production — as well as Eugène Sartory's output, whose early-career bows show dark woods recalling the aesthetic of the previous century, while the later production tends towards noticeably lighter tones. These variations raise several hypotheses — deliberate choice, modification of supply chains, or late use of previously constituted stock — without it being currently possible to distinguish between them on solid documentary or anatomical grounds. A systematic study of these bodies of work remains to be conducted.

What these cases collectively attest is, however, more important than any one of them taken separately. Whether the variation owes to an aesthetic choice, a change of supply, or stock exhaustion, it reveals that the visual category of "canonical pernambuco" has never designated a homogeneous biological reality — including in the workshops that today define the standard of "real pernambuco." Fétique's bench, Ouchard's, Sartory's: three reference workshops, three bodies of work in which the colour of the wood varies beyond what the documented variability of Paubrasilia echinata alone suffices to explain. The workbench sorting mechanism this essay describes — selection by performance, not by taxon — operated even in the workshops that today define the standard of "real pernambuco."

Conclusion

Three results emerge from the preceding analysis. The first is that the trade in dyewoods and pernambuco operated under the regime of a taxonomy of performance: strict botanical identity was neither operational nor verifiable within it, and Linnaean nomenclature deployed itself in parallel with commerce without steering it. On the docks as at the workbench, "Pernambuco" named an expected behaviour — in the dyer's vat, then at the bow-maker's bench — not a taxon. This disconnection between commercial name and material reality is, moreover, not peculiar to wood; it structures the entire raw-material supply of the instrument-maker.

The second result is that this taxonomy of performance produced two distinct sorting mechanisms drawing on the same commercial pool: upstream sorting by commission merchants classifying logs by density and pigment intensity, and downstream sorting at the workbench. The presence of Paubrasilia echinata in historical bows, anatomically documented on a sample of five pieces (Macedo et al., 2020), is plausibly the product of this downstream filtering, not of upstream botanical discrimination. For the elite bows of the great masters, the historical record can legitimately support the use of Paubrasilia echinata; for the Mirecourt production-line output, the same taxonomic certainty does not impose itself.

The case of Coulteria platyloba remains a plausibility study, not a historically demonstrated substitution. What the essay establishes is that the commercial system made such substitution structurally possible and likely recurrent — not that it is proven by direct archival evidence.

The third result concerns the present. In December 2025, at CoP20 in Samarkand, 185 sovereign States Parties to CITES adopted Decisions 20.239–20.243, tasking the Secretariat with developing by 2028 the traceability mechanisms applicable to Paubrasilia echinata. This diplomatic recognition ratifies the structural argument of this essay: botanical traceability is not a spontaneous property of the market — it is a system that remains to be built.

This work does not in any way challenge the ecological importance of Paubrasilia echinata or the legitimacy of conservation policies. Its subject concerns the historical fluctuation of nomenclatures and the limits of traceability applied to materials circulating in chains predating modern identification systems. The effort to build prospective traceability is necessary; the difficulty of doing so retrospectively results from a system we have inherited that was never designed to support botanical claims.

Acknowledging that we will never be certain of the biological identity of the woods sold under the name "Pernambuco" in the nineteenth century is not a historiographical admission of weakness. It is, on the contrary, the acceptance of a scientific reality: on the maritime routes of pre-modern globalisation, chemistry and profit dictated the names, leaving to botany — and now to history — the task of unpicking the threads a century later.

Appendix 1 — Species Likely to Have Circulated under Generic Appellations

Selection criteria: presence of brazilin or related pigments, commercially relevant distribution range, and plausibility of documented or inferable nomenclatural confusion.

Appendix 2 — Identifying Pernambuco on a Finished Bow

This appendix examines the question of species verifiability on a finished product, in order to measure the extent to which an actor in the commercial chain (historically and today) could or can genuinely certify the botanical identity of the wood they handle. It is essential to consider the finished product, because a trained botanist or xylotomist can today — and could in principle from the nineteenth century — distinguish raw Paubrasilia echinata from raw Haematoxylum brasiletto on the basis of end-grain anatomy, under a simple high-power loupe (10×). The problem this paper addresses is not that these woods are biologically indistinguishable in their raw state — they are not — but that the historical market chose not to distinguish them at the raw-material stage (on the docks), while modern inspectors are physically prevented from doing so at the finished-product stage (on a varnished bow). Botanical precision is therefore, by turns, economically without interest upstream and physically unverifiable downstream.

The Limits of the UV Test on a Finished Bow

The UV fluorescence test on an aqueous extract, which allows pernambuco to be distinguished from some of its relatives on fresh raw wood, becomes rigorously inapplicable to a finished bow for two reasons. The first is mechanical: a bow is systematically varnished or surface-treated. The varnish, however thin, filters or modifies the UV response and renders any fluorescence reading uninterpretable without prior sampling. The second, more fundamental, is chemical: yellow fluorescence under UV is not an exclusive property of Paubrasilia echinata. Caesalpinia sappan also produces bright yellow fluorescence under UV excitation. The test therefore does not discriminate between brazilin-bearing species — it discriminates only between woods rich in brazilin and those that are poor in it. The idea that a luthier or a customs officer, in 1850 or even today, could authenticate pernambuco using this simple test is therefore without scientific foundation.

What Modern Science Requires for Reliable Identification

The methods genuinely discriminating between closely related species are all either destructive or require laboratory equipment.

Raman spectroscopy (FT-Raman) — A study published in Analyst (RSC Publishing, 2003) applied this technique to archival samples of C. echinata, C. sappan, H. brasiletto, and H. campechianum to establish an identification protocol using spectral biomarkers. Although non-destructive, this method requires a precision Raman spectrometer inaccessible outside a specialised laboratory.

HPLC coupled with mass spectrometry — A 2025 study (Nasilowska & Lech, ScienceDirect) developed an analytical protocol combining HPLC-UV-Vis-ESI MS/MS with chemometric analysis to specifically differentiate logwood, sappan, pernambuco, and peachwood (H. brasiletto) — exactly the four species historically confused in "Brazilwood" cargoes. This level of analysis belongs to heritage conservation laboratories.

Wood anatomy (microscopy) — Macedo et al. (2020) analysed the anatomy of five historical French bows — a Lupot (1810), a Grand Adam (1840), a Vuillaume (1850), a Sartory (1890), and a Mirecourt bow of 1920 — by comparison with 33 Brazilian reference specimens. All five sticks were identified as Paubrasilia echinata of the "arruda" morphotype, most likely from north-eastern Brazil (Rio Grande do Norte and Paraíba). While the most accessible of the three methods, it remains semi-destructive (requiring a micro-sample).

The CITES Paradox: Certifying without Being Able to Verify

The contemporary regulatory situation illustrates the practical impossibility of identification. The certification procedure rests on a written declaration by a bow-maker or expert evaluator. No chemical or anatomical test is required. The chain of trust therefore remains documentary and declaratory — exactly as it was in the nineteenth century, except that an administrative form has been added. CoP20 in Samarkand (December 2025) explicitly acknowledged this gap by adopting Decisions 20.239–20.243, which task the CITES Secretariat with developing, over three years, the traceability mechanisms that do not yet exist.

This essay's argument concerns retrospective traceability — the a posteriori application of taxonomic certainty requirements to historical materials — and not the value of contemporary monitoring instruments, whose utility is real. These two objects are distinct: to conflate them is to extend to a historical object an evidentiary requirement that no contemporary source could have satisfied. Ultimately, if the international institutions for biodiversity protection have renounced requiring analytical verification of the species on a finished bow, it is precisely because such verification is, in practice, impossible without partially destroying the object. To project retrospectively onto nineteenth-century actors an identification capacity that we do not yet possess today constitutes a methodological anachronism.

The author thanks Anne Levi for her careful reading of the manuscript. The author also thanks Dr. H.-G. Richter (Universität Hamburg, ITESwoodID) for the permission to reproduce the anatomical images and for the confirmation of the etymology of "brasil" from the Portuguese "brasa."
The author made use of AI assistance tools in the preparation of this text, notably for the translation of sources, the structuring of the argument, stylistic revision, and certain technical verifications. The historical interpretations, analyses, arguments developed, and editorial choices are entirely the responsibility of the author.