Chimpanzee; Pan troglodytes endangered 1; Bornean orang utan; Pongo pygmaeus endangered 2; Guinea baboon; Papio papio; near threatened 3; Cape baboon; Papio ursinus porcarius threatened 4; Simia seniculus; central yellow baboon 5; Papio cynocephalus threatened 6. Handcoloured copperplate engraving from Bertuch's 鈥楤ilderbuch fur Kinder' (Picture Book for Children); Weimar; 1798. Friedrich Johann Bertuch (1747-1822) was a German publisher and man of arts most famous for his 12-volume encyclopedia for children illustrated with 1;200 engraved plates on natural history; science; costume; mythology; etc.; published from 1790-1830.