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 Thomas Warner to Philip Lutley Sclater regarding candidates for the office of Prosectorship to the Zoological Society of London
Letter from William Warry to Philip Lutley Sclater declining his election as a Fellow of the Zoological Society of London
Letter from Edward Warwick to Philip Lutley Sclater regarding a Dr Barker
Letter from Walter Weld to Philip Lutley Sclater regarding his Fellowship at the Zoological Society of London
Letter from R H D White, President of the Zoological Society of New South Wales, to Philip Lutley Sclater requesting advice in connection with Sunday opening
Letters from William Edward de Winton to Philip Lutley Sclater regarding appointment as Acting Superintendent of the Gardens of the Zoological Society of London and Secretary to the Garden Committee, and his resignation in 1903
Letters from Henry Woodward to Philip Lutley Sclater regarding the career of Arthur Cates as a natural history draughtsman
Letter from Frederick Talbot, Secretary of the South Staffordshire Industrial and Fine Arts Exhibition 1869, to Philip Lutley Sclater requesting assistance to show birds and fish during the exhibition
Letter from William Tallack to Philip Lutley Sclater regarding his visit to the Gardens of the Zoological Society of London