Correspondence regarding Fellows of the Zoological Society of London and proposals regarding changes to Fellows' subscriptions

Letter regarding a final paragraph for Solly Zuckerman's draft about Awards of the Zoological Society of London

General correspondence with Sir Martin Wyatt Holdgate regarding his memoirs, recognition of Solly Zuckerman, foot and mouth disease and the death of Sir William Henderson

Policy papers by the President of the Zoological Society of London, Sir Martin Wyatt Holdgate

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

Report of a meeting between the Trustees of the British Museum and the representatives of the Museum Conference of Naturalists, with correspondence, a memorandum on the problem of combining the administrative and technical or scientific direction of National Museums with special reference to the British Museum (Natural History) and papers from meetings

Report on the Marine Biological Association of the United Kingdom in Plymouth

Letter to Dr A Tindell Hopwood of the British Museum (Natural History) inviting him to act as Honorary Editor for a further volume of Nomenclator Zoologicus

Correspondence with the Zoological Society of Jos regarding assistance from the Zoological Society of London

Correspondence with the New York Zoological Society regarding the diet of Humming Birds from Ecuador