Letters from Richard Gibbons to David William Mitchell regarding his subscription to the Zoological Society of London
Letters from John Gould regarding his proposition to exhibit his hummingbirds
Letters from John Edward Gray regarding John Gould's collection of birds and his subscription to the Zoological Society of London
Letter from John Green to David William Mitchell regarding the transport of the hippopotamus on the 'Ripon' for the Zoological Society of London
Letter from Major-General Sir John Bennett Hearsey to David William Mitchell regarding pheasants and other rare birds for the Zoological Society of London
Letter from Charles Hengler to David William Mitchell regarding elks, moose and deer in his possession
Letters from Robert Hesketh to David William Mitchell regarding an estimate of work done to animal houses and enclosures at the Zoological Society of London, including the Terrance Dens and the Hippopotamus House
Letter from David William Mitchell to John Alexander Hope, 6th Earl of Hopetoun, regarding his membership of the Zoological Society of London
Correspondence between John Houston, David William Mitchell and the South Australian Banking Company regarding the sale of birds and a request by Prince Albert to bring a Platypus, Lyre Tailed Pheasant and Black Mackaw to the Zoological Society of London
Letters from Hunter and English to David William Mitchell regarding a steam engine and pumping machinery at the Gardens of the Zoological Society of London