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
Correspondence between G Fitzgerald-Lee and George Soper Cansdale regarding the Hughes Expedition and an offer to sell a female African Pygmy Hippopotamus to the Zoological Society of London
Correspondence between Hamet Saffi Canaana, the Keeper of Obaysch, and David William Mitchell regarding his service at the Zoological Society of London, with receipts
Correspondence between the Zoological Garden in Alipore and Geoffrey Marr Vevers regarding specimens collected by Mr Frost, and a request for Chimpanzees and a Pigmy Hippopotamus
Letters from Sir Frederick William Adolphus Bruce to David William Mitchell regarding the gift of a female hippopotamus from Egypt for 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