Letter from Abraham Dee Bartlett to David William Mitchell regarding the weight of the flesh, bones, skin and organs of an elephant
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
Copy of a letter from Earl Charles John Canning to Colonel Phipps regarding birds in Calcutta and an expedition by an agent of the Zoological Society of London
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
Letter from Sir George Cornewall Lewis to David William Mitchell regarding the Treasury not being prepared to purchase the collection of the Museum of 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
Letters from Sir Charles Beaumont Phipps to David William Mitchell regarding Prince Albert
Letter from Sautet and Robinet to David William Mitchell regarding the destruction of insects in the Gardens of the Zoological Society of London