French engraving representing two types of monkey (the jocko and the pongo) by the drawer Edouard Travies dating from the middle of the 19th century.
Édouard Traviès de Villers, born in Doullens on March 24, 1809, and died in Paris 5th on November 18, 18761, is a well-known animal painter, illustrator and lithographer. This engraving is probably the result of a reissue of the encyclopedia on wildlife of Buffon.
The Jocko is a monkey described by the Earl of Buffon in the fourteenth volume of his Natural History published in 17661. It is presented, alongside the «Pongo», as an orangutan. His description actually corresponds to that of a chimpanzee reported to France in 1740 and died the following year in London.