Letters from William Hillier Onslow to Philip Lutley Sclater regarding whether the Zoological Society of London would like to have a pair of Keas, membership of the Zoological Society, and the preservation of native birds of New Zealand. Also a report on Native New Zealand Birds with a memorandum by Lord Onslow.

Papers relating to the official opening of the Blackburn Pavilion including a timetable, invitation to the opening and invitation to Bird Song Breakfast

Letter from Sir Richard Owen to William Ogilby regarding his attendance at a committee meeting of the Zoological Society of London and a big bird bone which he believed to be about the age of a Dodo

Letters from Sir Richard Owen to Philip Lutley Sclater on subjects such as plates of the Dodo, papers on bird bones, notes on the dissection of a penguin, cetacean drawings, chambered shells, drawings of birds from Madras, photographs of harpagornis and his papers on diornis

Correspondence between the People's Dispensary for Sick Animals of the Poor and Geoffrey Marr Vevers regarding records of animals and birds on war service for the Imperial War Museum and Forces Mascots

Plans of the bird house for Carmine Bee Eaters

Plans relating to proposed garden improvements, with papers regarding the future of the parrot collection, a report by the curator of mammals and birds and Parrot House plans

Letters from Sir Robert Ker Porter in Caracas thanking Bennett for the his letter and Proceedings of the Society's committees, the good health of a tapir, a bear belonging to a resident in Caracas, a bird called Curapoas (or Forvies), the shipment of a Capuchin Monkey, 'a very curious little animals of the weasel kind, and six land tortoises by the Brig 'Pedraza', a consignment he received save for the weasel which was washed overboard, and descriptions of the consignment in the 'Pedraza'

Correspondence between Sydney Porter and Geoffrey Marr Vevers regarding donations of birds to the Zoological Society of London