Letters from Joseph Henry of the Smithsonian Institute, to Philip Lutley Sclater regarding botanical specimens from the Zoological Society of London and specimens of South American birds to be named and described for the Smithsonian Institute

Letters from John Edward Grey of the British Museum to Philip Lutley Sclater regarding the key to the gardens of the Zoological Society of London, a paper on tortoises, specimens of a monkey and lemur to be exhibited at a meeting, the death of a gorilla, meetings of the Council, and reports of the Proceedings of the Zoological Society of London

Letters from Edward Pierson Ramsay, Curator of the Australian Museum, to Philip Lutley Sclater regarding the transportation of a ceratodus to the Zoological Society of London

Letters from Wilhelm Carl Hartwig Peters of the Museum Regium Zoologicum, to Philip Lutley Sclater regarding Huxley's paper, a sketch of the plan of the monkey house, plates, specimens in his possession, and his memoirs

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

Includes: Report on the value of the Reserved Collection, 1851; Dr Crisp. Museum Stores; List of Animals Presented to the Norwich Collection; Catalogue of specimens of cruise, 1849; etc. Also includes printed extracts from the Annual Reports regarding the Museum, and a printed petition to the Chancellor of the Exchequer to buy the collection. The Dr Crisp item is a list of articles purchased by him from the Museum, including the skin of a giraffe. 

Returns of specimens in the Museum of the Zoological Society of London, including dried specimens of fish and reptiles, mounted mammalia, mounted birds, skulls, skeletons and small collections

Letters from C J Battersby, of the British Museum (Natural History), regarding Dr Smith's specimens, the feeding of snakes, papers bought for Joan Procter, and Christmas greetings

Letter from Gladwyn Noble of the American Museum of Natural History, to Joan Procter regarding exchanges of specimens with the Zoological Society of London

Letters from Franz Werner to Joan Procter regarding specimens of snakes, an exchange of papers, volumes by Mr Boulenger, a gift of newts, a new frog in London Zoo, and Procter's position at the British Museum