Letters from Arthur Walden, Marquess of Tweedale, to Philip Lutley Sclater regarding an offer from the Duke of Wellington of two male llamas, Fellowship of the Zoological Society of London, specimens of an insect, and subscriptions to the Society
Letters from Alfred Russel Wallace to Philip Lutley Sclater regarding the purchase of a joint residential estate, extracts read at meetings of the Zoological Society of London, papers for the Proceedings of the Zoological Society of London and Natural Science, his publication on 'Monkeys - their structure, affinities and distribution', a shipment of birds for the Society, improvements to the Gardens of the Zoological Society of London, notes on the Umbrella Bird, his election as a Fellow, papers on marine mammals, opinions on theories by Darwin, Birds of Paradise, and a list of butterflies of Costa Rica
Letter from the Zoological Society of London to Mr Ward regarding his son Douglas and his offer to act as the Society's agent in Whitstable to procure living specimens for the Society's Aquarium
Articles of Agreement and correspondence between John Warwick with the Zoological Society of London and the Earl of Derby regarding a voyage to Egypt and Nubia to procure live animals and birds for the Zoological Society of Lonon
Correspondence between the Zoological Garden in Alipore and the Zoological Society of London regarding a collection for the Society being shipped from Colombo to Calcutta by Mr Osman Hill