Letters from Sir Clement Lloyd Hill to Philip Lutley Sclater regarding the way in which animals and birds were shot down in new countries, and draft reply concerning papers put out by the Zoological Society of London for the protection of birds

Letters from Sir Joseph Dalton Hooker to Philip Lutley Sclater regarding collections of birds and botany

Letters from William Henry Hudson to Philip Lutley Sclater regarding cuckoos, shipments of birds to the Smithsonian, Woodpeckers in Argentina, Blackbirds and other birds

Letters from Thomas Henry Huxley to Philip Lutley Sclater asking about available birds for dissection, meetings of the Council of the Zoological Society of London, proofs and woodcuts for a paper, specimens of birds and the Marine Biological Association

Letters from Sir Harry Hamilton Johnston to Philip Lutley Sclater regarding posts open at the Foreign Office for the consular department, the Kilimanjaro Expedition, papers on birds, mammals and insects from Kilimanjaro, medals to be awarded for services to zoology, animals and specimens sent by Mr Johnston to the Zoological Society of London, drawings of animals, a visit to the gardens of the Zoological Society of London by the Katikiro of Uganda and his party, and his election as a member of the Council and attendance at meetings, and the Zoological Club

Letters from Sir John Graham Kerr to Philip Lutley Sclater regarding lists of birds, his degree course, his collection of birds, and papers

Letters from Clements Robert Markham, Secretary of the Royal Geographical Society, to Philip Lutley Sclater regarding permission for his cousin to take photographs in the gardens of the Zoological Society of London, a request to review Eastern Persia for the Geographical Magazine, Sclater's membership of the Geographical Society, a representation to the government with a view to the exploration of the North Pole region, the Spitsbergen bird, and an order for his wife and himself to see their dogs at the gardens

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.

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

Letters from Thomas Mayne Reid to Philip Lutley Sclater regarding his sale of Jacob Sheep and books or papers about British birds