Memorandum regarding periods of fertility and the fertility rates of the various species of mammals on Exhibition at the Gardens of the Zoological Society of London since 1826

Correspondence with Philadelphia Zoo regarding the transport of snakes and the breeding of Tarsiers

Minutes of the Breeding Policy Committee, later the Committee of the Wellcome Institute of Comparative Physiology, of the Zoological Society of London

Reports of the Gene Bank for the Breeding Policy Committee, later the Committee of the Wellcome Institute of Comparative Physiology, of the Zoological Society of London

Papers regarding the policy of the Breeding Policy Committee, later the Committee of the Wellcome Institute of Comparative Physiology, of the Zoological Society of London

Press releases from the Institute of Zoology regarding the world's first Przewalski Wild Horse born to a surrogate pony, breeding endangered species, a new veterinary hospital at Whipsnade, British wildlife to benefit from health research and a Zoological Society of London scientist winning an International Environment Award

Correspondence between Copenhagen Zoo and Geoffrey Marr Vevers regarding a visit to London and Whipsnade Zoos, with arrangements regarding the transfer of animals

Correspondence between ZSL Library and Geoffrey Marr Vevers regarding a report about Congo Elephants to be deposited in the Library, the return of a book to the Library called 'Wild Animals in Captivity, a collection of photographs taken by the husband of Cherry Kearton, and a donation of engravings from Lady Smith Woodward

Letter from Antwerp Zoo, with papers on Consideration Upon the Necessity of Coordinating All Observations Taken on Okapis Living in Captivity, and Ways in Exhibiting Birds in Cages

Correspondence between W H Hale and George Soper Cansdale regarding the export of animals from Kenya and lists of approved Zoos