Letters from William Harrison Ainsworth to David William Mitchell regarding the cancellation of his subscription to the Zoological Society of London
Letter from Henry Francis Ainslie to Philip Lutley Sclater about plans for the erection by the Zoological Society of a new 'cats house or house for lions, tigers, and other large Felidae.'
Letters from Alexander Agassiz to Philip Lutley Sclater about the collections of British Museum and Jardin du Plantes, Paris
Letter to Fellows of the the Zoological Society of London with a request to help the Admiralty by providing topographical information and images of areas they have travelled abroad
Letters from Keith Edward Abbott to Edward Turner Bennett regarding bird skins from and for the Zoological Society of London
Copies of letters regarding the drainage system of the gardens of the Zoological Society into Regent's Canal, with accompanying map
Report by William Yarrell and Mitchell about purchase of greyhounds from Abbas Pasha