Letters from William Smith to David William Mitchell regarding the price of Reports and Proceedings of the Zoological Society of London
Letters from S S Tenlon to David William Mitchell regarding the New Pheasantry, a building and enclosure for the aurochs, and for an addition to the Giraffe House at 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
Letters from William Thompson to David William Mitchell regarding statements of accounts of the Zoological Society of London
Correspondence between Sir Henry Drummond Wolff and David William Mitchell regarding payments to the Zoological Society of London
Letters from Sir George Clerk to David William Mitchell regarding the Chancellor of the Exchequer and the purchase of a museum collection of the Zoological Society of London
Letter from William Dumbreck to David William Mitchell offering to dispose of a tiger from the Edinburgh collection
Letters from Richard Gibbons to David William Mitchell regarding 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 to Ganpat Rao Gaekwad, Guicowar of Baroda, from the Zoological Society of London to acknowledge the safe arrival of a pair of tigers