23 journal volumes of approx 180 pages each. 5 vols of photographs illustrating the text

Letter from Edward Bourke Ellis to Philip Lutley Sclater offering to bring a few gorillas to England on his return from Africa

Descriptions of birds seen

Correspondence between Sir Arthur Landsborough Thomson and L Harrison Matthews regarding meetings of the Selection Committee, the Annual Report, meetings of the Finance Committee, meetings of the Publications Committee, statement of the duties of Honorary Officers, the arrangement of Committees, abstracts in the Ibis, the Zoological Record, the Chairman of the Pink Elephants, the Proceedings of the Zoological Society of London, Scientific Meetings, the British Guiana expedition, meetings of the Prosectorial Committee, the United Workers' Association, Professional Fellows, the Medical Research Council, the Centenary celebration of Madras Zoo, allegations against staff, Gerbils of the genus Meriones, and cases of controlling inter-current tuberculosis among colonies of monkeys

Letters from Joseph Cornely to Philip Lutley Sclater regarding a voyage

Letter from Paul Corin to Philip Lutley Sclater regarding an expedition by Captain Zozilla

Letters from Hugh Childers to Philip Lutley Sclater regarding expeditions by the Admiralty to observe the transit of venus

Copy of a letter from Earl Charles John Canning to Colonel Phipps regarding birds in Calcutta and an expedition by an agent of the Zoological Society of London

Letters from John Samuel Budgett to Philip Lutley Sclater regarding his research on okapis and expeditions to study polypterus

Letter from John Samuel Budget to Peter Chalmers Mitchell requesting a grant from the Zoological Society of London towards the expenses of his expedition to Nigeria