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 London County and Westminster Bank Ltd regarding the account of Harmer Wood and Mitchell
Letters from Maud Minchin to Peter Chalmers Mitchell regarding her pension and a request to attend a meeting of the Committee of Publication. Also a letter from F M Burton regarding the late F M Minchin and a certificate for a funding loan
Correspondence between Maud Peavot and Peter Chalmers Mitchell regarding the Leslie Peavot Fund and an account book for the Fund. The Peavot Fund was held by the Secretary and Accountant of the Zoological Society and administered by them in consultation with Mrs Peavot, widow of the late H G J Peavot, the Society's Librarian, for the benefit of Leslie Peavot, his son
Letters from Lionel Nathan de Rothschild to Peter Chalmers Mitchell regarding his membership of 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
Letters from Edwin Linley Sambourne to Peter Chalmers Mitchell regarding the Bear Pit at the Gardens of the Zoological Society of London and his admission to the Gardens
Letters from Sewallis Edward Shirley, 10th Earl Ferrers, to Peter Chalmers Mitchell regarding his gift of a Wild Bull to the Zoological Society of London and his request that no progeny of the bull was to leave the Gardens
Letters, newspaper clippings and will of Herbert Spencer. The Zoological Society of London was one of 12 scientific societies which were beneficiaries of his estate