Letters from Alfred Russel Wallace to Philip Lutley Sclater regarding the purchase of a joint residential estate, extracts read at meetings of the Zoological Society of London, papers for the Proceedings of the Zoological Society of London and Natural Science, his publication on 'Monkeys - their structure, affinities and distribution', a shipment of birds for the Society, improvements to the Gardens of the Zoological Society of London, notes on the Umbrella Bird, his election as a Fellow, papers on marine mammals, opinions on theories by Darwin, Birds of Paradise, and a list of butterflies of Costa Rica
Correspondence between Oliver Stanley, Secretary of State for the Colonies, and the Zoological Society of London regarding a collection of fauna of East Africa
Letter from the Zoological Society of London to Mr Ward regarding his son Douglas and his offer to act as the Society's agent in Whitstable to procure living specimens for the Society's Aquarium
Letters from Frederick John Jackson of the Imperial Institute to Philip Lutley Sclater regarding zoological work of the British Polar Expedition and the offer of three young bear cubs to the Zoological Society of London
Correspondence between James Thompson, Head Keeper at London Zoo, and David William Mitchell regarding the expense to carry out the experiment of rearing mammals and birds in the Hill Country for transmission to Enland, and the transmission of a collection of Himalayan pheasants to the Zoological Society of London
Letter from Captain J G Green to offer a specimen of a barn door hen which had developed cock plumage to the Zoological Society of London
Letter from Hawthorne saying he will call at the Zoological Society of London and make arrangements about the Gazellus lysery
Letter from John Humphrys regarding the identification of shells he had though of as Indian origin, and a discussion about his collection
Letters from Rajendra Mullick to David William Mitchell giving thanks for a shipment of birds shipped from the Zoological Society of London and reports on zoology, and birds and animals onboard the Prince of Wales for the Zoological Society of London
Correspondence between Sir James Outram and David William Mitchell regarding an offer of tigers and a request for game birds, hunting cheetahs, the common leopard, hyenas, jackals and wolves