Letters from C Glasfurd to Philip Lutley Sclater regarding sending two bears to the Zoological Society of London
Report by William Yarrell and Mitchell about purchase of greyhounds from Abbas Pasha
Letters from William Harrison Ainsworth to David William Mitchell regarding the cancellation of his subscription to the Zoological Society of London
Letters from R I Bouchier to David William Mitchell regarding five ostriches for the Zoological Society of London, a lion from Sir Vincent Casolain and a collection of living reptiles
Letters from John Edward Gray regarding John Gould's collection of birds and his subscription to the Zoological Society of London
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
Letters from William Hill and Co. to David William Mitchell regarding the price for an engine and boiler at the Zoological Society of London
Letters from Sir Richard Owen to David William Mitchell regarding the cost of keeping elephants, his attendance at meetings of the Council of the Zoological Society of London, and his consent to act as Vice President