Essay on the natural history of Guiana, in South America. Containing a description of many curious productions in the animal and vegetable systems of that country. Together with an account of the religion, manners, and customs of several tribes of its Indian inhabitants. Interspersed with a variety of literary and medical observations. In several letters....London: T. Becket, 1769.
Bancroft was an English physician who lived for many years in South America. He noted the transmission of yaws by flies (p. 385 of his book). Digital facsimile from the Internet Archive at this link.
Subjects: ANTHROPOLOGY, COUNTRIES, CONTINENTS AND REGIONS › Guyana, COUNTRIES, CONTINENTS AND REGIONS › Latin America, INFECTIOUS DISEASE › Treponematoses › Yaws, Latin American Medicine, NATURAL HISTORY, TROPICAL Medicine