Letters from Thomas de Grey to Philip Lutley Sclater regarding his expedition down the Rocky Mountains into New Mexico, skeletons of mammals for the Cambridge museum, and a paper on West Indian Microlepidoptera for the Proceedings of the Zoological Society of London
Letter from John Humphrys regarding the identification of shells he had though of as Indian origin, and a discussion about his collection
Letter from M Swainson regarding the collection of fish purchased from the Zoological Society of London from the museum of Mr Guilding
Letter from Felix Anton Dohrn to Philip Lutley Sclater regarding an enquiry by Gegenbaur and publications of the Zoological Society of London
Letters from Friedrich Finsch, Curator of the Museum of Natural History in Bremen to Philip Lutley Sclater
Letters from Carl Jacob Sundevall, Director of the Royal Museum Stockholm, to Philip Lutley Sclater regarding specimens found in the Museum such as Galapagos birds
Letter from Michael Rogers Oldfield Thomas of the British Museum (Natural History) to Philip Lutley Sclater regarding the skin of a giraffe
Correspondence between the British Museum (Natural History) and Sheffield Airey Neave regarding delegates to the Conference on Nature Preservation in Post-War Reconstruction, and a meeting of the Council
Letter from, Bruce S Ingram to Philip Lutley Sclater requesting an illustration in the Illustrated London News of the mammal newly discovered by Sir Harry Johnston
Letters from Alphonse Milne-Edwards, Director of the Menagerie au Museum d'histoire naturelle, to Philip Lutley Sclater