Correspondence with G S Mottershead regarding the International Zoo Year Book

Correspondence with Bernard Fagg of the Department of Antiquities in Jos, regarding the drawing up of a constitution for the Zoological Society of Jos

Correspondence with Philadelphia Zoo regarding the transport of snakes and the breeding of Tarsiers

Correspondence with the Royal Zoological Society of Ireland regarding the transportation of part of the brain of a Canada Lynx to the Zoological Society of London, the transportation of cormorants, and the use of copper sulphate to keep Sea Lion ponds free from algae

Correspondence with the Royal Zoological Society of Scotland regarding anti-venine for the treatment of snake bites, hairy frogs, and the Aard Wolf

Colour negatives of views of Stuttgart, Frankfurt, Jakarta and Bogor Zoos

Letters from Herbert Thomas Dicksee to Philip Lutley Sclater regarding tickets for the gardens of the Zoological Society of London and his etched plates of lions and tigers, proofs of which he offered to the Society

Correspondence with Philadelphia Zoological Gardens regarding the War

Correspondence with Dierenpark Wassenaar regarding formula used for hummingbirds and the exchange of animals

3 visitor books spanning the following years: 1913-1925, 1947 and 1925-1936, 1944-1957. These books don't have any indictation of where exactly they were kept, although the main office or Zoo reception seems likely.