Letters from John Trivett Nettleship to Philip Lutley Sclater regarding admission to the Gardens of the Zoological Society of London, a recommendation for Miss Mary Irene Stoddard to receive a student ticket for admission, and a letter to Professor Flower regarding his proposed election as Fellow
Letter from Otto Kersten to Philip Lutley Sclater regarding his East African exploring project
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
Letter from John Samuel Budget to Peter Chalmers Mitchell requesting a grant from the Zoological Society of London towards the expenses of his expedition to Nigeria
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
Letter from William Schwenck Gilbert to Peter Chalmers Mitchell regarding an offer of two monkeys to the Zoological Society of London
Letter from John D Hamlyn to Peter Chalmers Mitchell regarding a gorilla and a chimpanzee for sale
Letter from William Henry Hudson to Peter Chalmers Mitchell enclosing a copy of Birds of La Plata for the Library of the Zoological Society of London