{
  "id": "jose-manuel-davalos",
  "type": "entity",
  "name": "Jose Manuel Davalos: a Lima physician barred by blood law, and the quinoa memoir Paris turned down",
  "summary": "Son of a freed Black woman and shut out of Lima's university by the purity-of-blood statutes, Davalos took his medical degree at Montpellier and in 1787 offered the Societe Royale de Medecine of Paris a memoir on the heroic virtues of quinoa. Paris refused him. Lima's own journal granted that Europe esteemed his work and accused him of dishonouring his country by printing what its physicians got wrong.",
  "locale": "en",
  "tags": [
    "peru",
    "lima",
    "medicine",
    "science",
    "botany",
    "enlightenment",
    "eighteenth-century",
    "castas",
    "spanish-empire"
  ],
  "relations": [
    {
      "rel": "related",
      "target": "unanue-observaciones-clima-de-lima"
    },
    {
      "rel": "related",
      "target": "mercurio-peruano-1791"
    },
    {
      "rel": "related",
      "target": "quina-cascarilla-del-peru"
    },
    {
      "rel": "related",
      "target": "old-world-plants-in-andean-healing"
    },
    {
      "rel": "related",
      "target": "protomedicato-de-las-indias"
    },
    {
      "rel": "related",
      "target": "universities-of-lima-and-mexico"
    },
    {
      "rel": "related",
      "target": "medicinal-plant-trade-from-spanish-america-1717-1815"
    },
    {
      "rel": "related",
      "target": "unanue-guia-del-peru-1793"
    }
  ],
  "questions": [
    "Who was Jose Manuel Davalos?",
    "Could people of African descent practise medicine in colonial Peru?",
    "When was quinoa first proposed as a medicine to European academies?",
    "Why did the Societe Royale de Medecine reject a Peruvian physician's memoir?"
  ],
  "claims": [
    {
      "id": "c1",
      "text": "Davalos was born at Lima in 1758 and died in 1821. His father, Joaquin Davalos, was a criollo from Quito; his mother, Maria Zamudio, was a freed Black woman from Trujillo. The parentage is not incidental to the rest: it is the fact around which his career had to be built.",
      "sources": [
        "cerpa-estremadoyro-davalos-quinua-2024"
      ],
      "confidence": 0.85
    },
    {
      "id": "c2",
      "text": "The obstacle was statutory, not merely social. The study cited here describes the restrictions he faced in the Viceroyalty of Peru as arising from the laws on \"limpieza de sangre\" which \"excluian de manera formal a los afroamericanos\" and their descendants from the universities and from the medical professions. The route he took - leaving for a French faculty - is what those statutes made necessary.",
      "sources": [
        "cerpa-estremadoyro-davalos-quinua-2024"
      ],
      "confidence": 0.85
    },
    {
      "id": "c3",
      "text": "He trained at the medical faculty of Montpellier under Paul-Joseph Barthez, one of the founders of medical vitalism, and Antoine Gouan, who introduced binomial nomenclature in France, and early in 1787 defended a Latin dissertation on the endemic diseases of his own city, \"De morbis nonnullis Limae grassantibus ipsorumque therapia\", which opens with a sketch of the medical topography of Lima.",
      "sources": [
        "cerpa-estremadoyro-davalos-quinua-2024"
      ],
      "confidence": 0.85
    },
    {
      "id": "c4",
      "text": "That dissertation is independently attested in Lima four years later, by a source with no connection to the modern study. Note 9 on page 125 of the third volume of the Mercurio Peruano cites \"Joseph Emanuel de Davalos Doctor Monspeliens. De Morbis Limae grassantibus: pag. 21\", and adds that \"El Diario Medico de Paris, y el Espir. de los mej. Diar. de Europa elogian esta apreciable obrita\" - the Paris medical journal and the Espiritu de los mejores diarios de Europa praise the little work.",
      "sources": [
        "mercurio-peruano-1791-t3"
      ],
      "confidence": 0.9
    },
    {
      "id": "c5",
      "text": "The same page carries the reproach, and it is the sharpest single piece of evidence about how he was received at home. The text to which that note is attached reads: \"Un Autor Patricio, de cuyas aplicaciones ha hecho la Europa el justo aprecio que se merecen, no honro a la verdad, ni a su Patria en publicar se morian en ella muchos de los que padecian fiebres malignas por el temor y morosidad de sus Profesores en recurrir a la ancora sagrada.\" The charge is that he told Europe that people in Lima were dying of malignant fevers because local physicians were slow and afraid to reach for the bark. The compliment and the accusation are in the same sentence.",
      "sources": [
        "mercurio-peruano-1791-t3"
      ],
      "confidence": 0.9
    },
    {
      "id": "c6",
      "text": "The rebuttal that follows is a clinical one rather than an appeal to standing, and the note ends by conceding the premise it is defending against. The editors set out the Lima regimen for malignant fevers in doses and say they have lengthened the note \"con el designio de que la Medicina de estos paises dexe de ser una ciencia puramente tradicionaria\", asking practitioners to send in their observations so the Sociedad can order them \"sin usurpar la gloria que fuese debida a sus talentos y dedicacion\".",
      "sources": [
        "mercurio-peruano-1791-t3"
      ],
      "confidence": 0.85
    },
    {
      "id": "c7",
      "text": "In December 1787 he submitted to the Societe Royale de Medecine in Paris an untitled French manuscript, known since as the \"Memoria sobre las virtudes heroicas de la quinua\", in support of an application for foreign membership. It presented quinoa as a resolvent and diuretic: the decoction of the seed, it claimed, had proved effective in contusions, internal abscesses and pleurisy.",
      "sources": [
        "cerpa-estremadoyro-davalos-quinua-2024"
      ],
      "confidence": 0.85
    },
    {
      "id": "c8",
      "text": "The application was rejected, in spite of a laudatory introduction from the Spanish diplomat Mateo Esteban Quilty y Valois, in a report by the botanist Antoine-Laurent de Jussieu resting on three grounds: that the plant was classified as Amaranthus blitum, which is not its genus - the Chenopodium binomial was not published until 1797; that the account of its medicinal qualities was imprecise and rested on two brief anecdotal cases, so that \"es dificil obtener del informe un beneficio sustancial sin que el autor proporcione una elaboracion mas detallada\"; and that the title of foreign associate was granted only to physicians already famous for numerous and useful works.",
      "sources": [
        "cerpa-estremadoyro-davalos-quinua-2024"
      ],
      "confidence": 0.85
    },
    {
      "id": "c9",
      "text": "The counterpoint is his own. In his Alegato of 1810 he stated that a memoir on chemistry had earned him corresponding membership of the Paris medical academy - a reframing of what had in fact been a refusal. The study cited here reads the rejection as turning less on the technical faults than on the machinery by which scientific credibility was then granted, which required proximity, institutional affiliation and face-to-face acquaintance with the centres of European science; that reading is the author's interpretation and is marked as such.",
      "sources": [
        "cerpa-estremadoyro-davalos-quinua-2024"
      ],
      "confidence": 0.8
    },
    {
      "id": "c10",
      "text": "He was nevertheless a working scientific authority in Lima, and a second independent source shows it. Page 7 of Unanue's Observaciones sobre el clima de Lima carries, in note 2, the citation \"Dr. Davalos: Informe sobre las Aguas. M.S. 1789\", set beside \"Dr. Bueno: Disert. del Agua. Efemerid. 1759\" as the authority for the analysis of the city's spring water - the finding of more than usual selenite, much greda marcial and different fatty earths, waters growing more impure as they were distributed through the public fountains, and saturation with fixed air. His report was a manuscript and is cited as one.",
      "sources": [
        "unanue-clima-de-lima-1815"
      ],
      "confidence": 0.85
    },
    {
      "id": "c11",
      "text": "The limits of the evidence. The quinoa memoir itself was not opened for this object; its content and Jussieu's report reach it through one study of 2024, and the identification of the manuscript, its date and its reception rest on that study alone. The two eighteenth-century pages read here witness the Montpellier dissertation and a manuscript report on water, not the quinoa memoir. No page read here shows Davalos holding a chair, a hospital post or a licence in Lima, and none gives the outcome of the 1810 Alegato.",
      "sources": [
        "cerpa-estremadoyro-davalos-quinua-2024",
        "mercurio-peruano-1791-t3",
        "unanue-clima-de-lima-1815"
      ],
      "confidence": 0.9
    }
  ],
  "takeaways": [],
  "faqs": [],
  "evidence_tier": "secondary",
  "evidence": {
    "level": "industry_observation",
    "source_types": [
      "paper"
    ]
  },
  "moat_flag": false,
  "winning_edge": "What exists in English on Davalos is a name in lists of Peruvian physicians, and what exists on quinoa's medical history begins in the twentieth century. This object dates a proposal of quinoa as a medicine to a European academy to December 1787, names the plant's misclassified binomial and the botanist who refused it, and gives the three stated grounds of refusal. It then does what a biography of exclusion usually will not: it sets a Spanish American source against its own subject. The Mercurio Peruano of 1791 is quoted granting that Europe rightly esteemed his work and accusing him in the same sentence of dishonouring truth and country, and Unanue is quoted citing his manuscript on Lima's waters as an authority. The exclusion, the achievement, the local hostility, the Paris refusal and his own later overstatement of it are all on the record together, each bound to the source that carries it.",
  "confidence": 0.83,
  "last_verified": "2026-08-15",
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    "name": "Jose Manuel Davalos: a Lima physician barred by blood law, and the quinoa memoir Paris turned down",
    "description": "Son of a freed Black woman and shut out of Lima's university by the purity-of-blood statutes, Davalos took his medical degree at Montpellier and in 1787 offered the Societe Royale de Medecine of Paris a memoir on the heroic virtues of quinoa. Paris refused him. Lima's own journal granted that Europe esteemed his work and accused him of dishonouring his country by printing what its physicians got wrong.",
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    "citation": [
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        "name": "Mercurio peruano de historia, literatura, y noticias públicas que da á luz la Sociedad Academica de Amantes de Lima, y en su nombre D. Jacinto Calero y Moreira. Tomo III, que comprehende los meses de Septiembre, Octubre, Noviembre, y Diciembre de 1791",
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        "name": "Observaciones sobre el clima de Lima, y sus influencias en los seres organizados, en especial el hombre. Segunda edicion",
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      {
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        "name": "Una disertación médica olvidada del siglo XVIII: la \"Memoria sobre las virtudes heroicas de la quinua\", de José Manuel Dávalos",
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