Letters from North Metropolitan Railway and Canal Co. to Philip Lutley Sclater regarding drainage from the Gardens of the Zoological Society of London into Regent's Canal
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 Lord Alfred Henry Paget to Philip Lutley Sclater regarding visits to the Zoological Society of London
Letters from Sir Francis John Pakenham to Philip Lutley Sclater regarding the Picomayo expedition and Mr Kerr's collection
Correspondence between G North Peal and Philip Lutley Sclater regarding the death of the previous Secretary of the Zoological Society of London, David William Mitchell
Letters from Sir Thomas Townsend Pears to Philip Lutley Sclater regarding an Abyssinian expedition, during which Mr William Jesse collected about 1250 specimens
Letters from Alexander Peebles to Philip Lutley Sclater regarding the erection of greenhouses at the Gardens of the Zoological Society of London, with a list of buildings erected since 1866
Letters from August von Pelzeln to Philip Lutley Sclater
Letters from Harriett Pennell to Philip Lutley Sclater regarding Mr Pennell's subscription to the Fellowship of the Zoological Society of London