Quassi, the Surinam slave who discovered quassia, Leonard Parkinson, leader of the Maroons of Jamaica, and Maroon rebel. Vignette below shows slaves being taken from the slaver to a fort in the colonies, with a black hunter in the foreground. Handcolored copperplate engraving from G. T. Wilhelm's "Encyclopedia of Natural History: Mankind," Augsburg, 1804. Gottlieb Tobias Wilhelm (1758-1811) was a Bavarian clergyman and naturalist known as the German Buffon.