A gorilla being marched along immediatedly after its capture in the Belgian Congo, circa 1960. (Photo by H. Goldstein/Central Press)

British captain A. Gatti and two pygmies with a 500lb gorilla strung from a pole, which the captain shot in the Tchibinda forest in the Lake Kivu region, Democratic Republic of the Congo, circa 1930. (Photo by General Photographic Agency)

A group of African tribespeople squat round a huge dead gorilla, January 1932. (Photo by Topical Press Agency)

Tribesmen stand by a captive gorilla, circa 1925. (Photo by General Photographic Agency)

Taxidermists at work stuffing a gorilla at the Natural History Museum in London, 1968. (Photo by Chris Ware/Keystone Features)