Plans showing proposed alterations to the Great Ape Breeding Colony

Letter from Arthur F Astley to Philip Lutley Sclater regarding the subject of reptile feeding at the Zoo

Letter from George Atkins to Philip Lutley Sclater regarding an animal that was found in Sierra Leone and exhibited at the Sierra Leone Exhibition

Notes by Julian Huxley on visits to the Zoological Gardens at New York (Bronx Park), Philadelphia, Washington DC, Paris (Vincennes), Hamburg, Berlin, Munich (Hellabrunn) and Frankfort, also the Aquarium at Chicago

Draft notes by Julian Huxley on visits to the Zoological Gardens at New York (Bronx Park), Philadelphia, Washington DC, Paris (Vincennes), Hamburg, Berlin, Munich (Hellabrunn) and Frankfort, also the Aquarium at Chicago

Memorandum regarding periods of fertility and the fertility rates of the various species of mammals on Exhibition at the Gardens of the Zoological Society of London since 1826

Correspondence between Mrs F Edwards and Julian Sorell Huxley regarding principles of keeping animals in captivity

Two lists: birds and quadrupeds, 29 April 1851 to 29 April 1852. Signed by James Hunt, Head Keeper

Letter from Antwerp Zoo, with papers on Consideration Upon the Necessity of Coordinating All Observations Taken on Okapis Living in Captivity, and Ways in Exhibiting Birds in Cages

Correspondence with Geoffrey Marr Vevers regarding Eider Ducks that were bred by Lieutenant Colonel Lumsden