Letters from Charles Kingsley to Philip Lutley Sclater regarding naturalists in Denver, Colorado, specimens for the Zoological Society of London, and the paper of the ex-governor of Trinidad
Letters from Christian Ferdinant Friedrich Krauss to Philip Lutley Sclater
Letters from Sir Richard Owen to Philip Lutley Sclater on subjects such as plates of the Dodo, papers on bird bones, notes on the dissection of a penguin, cetacean drawings, chambered shells, drawings of birds from Madras, photographs of harpagornis and his papers on diornis
Letters from Bennet Burleigh to Peter Chalmers Mitchell regarding two young ostriches and a squirrel from Somaliland to be gifted to the Zoological Society of London
Letters from Lionel Walter Rothschild to Peter Chalmers Mitchell regarding the preparation of food for Rheas and Emus and agreeing that Mr Boulanger can take the Chimpanzee home
Letters from Herbrand Russell, 11th Duke of Bedford, to Peter Chalmers Mitchell regarding animals available for purchase by the Zoological Society of London, including a zebra and a Cow Aurox from Hagenbeck at Hamburg
Correspondence between John Johnson of the University Press Oxford, to Julian Sorell Huxley regarding estimates for printing
Correspondence between John Spedan Lewis, of the John Lewis Partnership, and Julian Sorell Huxley regarding the design and construction of a new Elephant and Rhinoceros House at the Zoological Society of London
Correspondence between J W Milne and Julian Sorell Huxley regarding the financing of the construction of a new Elephant House, and a donation from Lord Leverhulme
Letters from Julian Sorell Huxley to Sheffield Airey Neave regarding meeting and business of the Record Committee of the Zoological Society of London