Letters from Alfred Russel Wallace to Philip Lutley Sclater regarding the purchase of a joint residential estate, extracts read at meetings of the Zoological Society of London, papers for the Proceedings of the Zoological Society of London and Natural Science, his publication on 'Monkeys - their structure, affinities and distribution', a shipment of birds for the Society, improvements to the Gardens of the Zoological Society of London, notes on the Umbrella Bird, his election as a Fellow, papers on marine mammals, opinions on theories by Darwin, Birds of Paradise, and a list of butterflies of Costa Rica

Paper on Okapis for consideration at the Garden Committee and Council Meetings on the 18th an 19th September 1934

Papers regarding a proposed new Nomenclator Zoologicus

Papers written on animal classifications, geographical distribution of animals and adaption in animals

Remarks by Abraham Dee Bartlett on Mr Gambier Bolton's paper about suggested improvements at the Gardens of the Zoological Society of London

Letter from Edward Burton to say that he has discovered changes to a specimen on which he had prepared a draft paper. He suggests change of scientific name accordingly

Letter from Julien Francois Desjardins to Edward Charlesworth, Assistant Secretary of the Zoological Society of London, regarding the Proceedings of the Zoological Society of London and papers for publication

Circulars, printed papers and correspondence of Dr Bidder, mainly concerning the Meetings of British Zoologists, the forming of the Association of British Zoologists, and urging the split of the British Museum and the Natural History Museum. Most are from 1920's and are unordered. Includes letters from Prof. Balfour-Browne, P Chalmers Mitchell and E Ray Lankester, etc

Notebook of manuscript copies of printed papers by Hodgson, 1848; letter from Darjeeling, 1847(?); letter to the editor of the Sporting Magazine, 1846