Day by day account of work in the ZSL Museum. Divided into Accessions, Anatomy, Preserving Department, Museum, Stores. Written by the Superintendent of the Museum, William Martin. Occasional entries by John Gilbert. Also mentions the work of Alexander Chambers, John Gould and Richard Owen.

Lists specimens in the Museum, with an arrival date, whether stuffed or in spirit, country, how obtained, and occasionally who deposited them. Arrival dates are from 1827-1840. Split into three groups of animals. Some specimens are from Sir Stamford Raffles' Sumatran collection. 

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

Minutes of a meeting of recorders and searchers held in the Board Room of the British Museum (Natural History)

Letter from Gavin de Beer of the British Museum (Natural History) regarding Desmond Morris and Congo

Letter to Dr F C Fraser of the British Museum (Natural History) regarding his name being put forward as the Society's representative on the National Committee of Biology

Letter from Emmett Reid Dunn of the Department of Zoology, Smith College, Massachusetts, regarding her resignation from the British Museum

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 Alphonse Milne-Edwards, Director of the Menagerie au Museum d'histoire naturelle, to Philip Lutley Sclater

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