A defence of the virtues of Jesuit's bark or Peruvian bark (cinchona, chinchona), the most celebrated specific remedy for malaria. It was obtained from the bark of several species of the genus Cinchona, of the Rubiaceae family, indigenous to the Western Andes mountains. Other terms referring to this preparation and its source were "Jesuit's Tree", "Jesuit's Powder" and "Pulvis Patrum". Bado includes evidence to show that “fever bark” was introduced into Spain in 1632. Digital facsimile from BnF Gallica at this link.