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

Papers regarding bird nesting at Whipsnade Zoo

Letter sent by G P Clifford to Philip Lutley Sclater regarding birds sent by the Otago Acclimatisation Society to the Zoological Society of London

Letter from Croizet bird dealers to Philip Lutley Sclater

Letters to PL Sclater asking him to correct the bird names in Darwin's new book, 'Descent of Man'.

Letters from Joseph Henry of the Smithsonian Institute, to Philip Lutley Sclater regarding botanical specimens from the Zoological Society of London and specimens of South American birds to be named and described for the Smithsonian Institute

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