Correspondence between Sir William MacGregor Henderson and Solly Zuckerman regarding the appointment of a new Director of Science, negotiations with the Department of Environment, a donation towards the cost of a new Discovery Centre at Whipsnade, a biographical memoir of John G Phillips and a successor to William Henderson

Correspondence between Sir William MacGregor Henderson and Solly Zuckerman regarding the financial future of the Zoological Society of London, the Scientific Fun and Zuckerman Prize Fund, nominations for the Silver Medal, the Lord Zuckerman Awards Fund, the future of the Education Building, the future President of the Society, new Ordinary and Scientific Fellows, and the Society's educational programme

Correspondence between the Sir Martin Wyatt Holdgate and Officers on matters relating to the Council of the Zoological Society of London

Correspondence between the Sir Martin Wyatt Holdgate and Fellows of the Zoological Society of London

Correspondence between Sir Martin Wyatt Holdgate, President of the Zoological Society of London, and the Department of the Environment

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

Letters from Alexander Agassiz to Philip Lutley Sclater about the collections of British Museum and Jardin du Plantes, Paris

Letters from John Anderson to Philip Lutley Sclater regarding the Indian Museum in Calcutta

Letter from Adolphe Edouard Arppe to Philip Lutley Sclater regarding the Societe de Sciences au Finlande