Letters from Carl Jacob Sundevall, Director of the Royal Museum Stockholm, to Philip Lutley Sclater regarding specimens found in the Museum such as Galapagos birds
Letters from H Windhorn to Philip Lutley Sclater regarding the transport and death of the Queen's Giraffe
Letters from Arnold Jerome Matthews to Philip Lutley Sclater regarding an expedition to the Gabon for the purpose of procuring some young living specimens of the gorilla, then available to purchase by the Zoological Society of London
Letters from Josiah McGregor to Philip Lutley Sclater regarding a Pilcomayo expedition
Letters from St George Jackson Mivart to Philip Lutley Sclater regarding papers he was writing for the Zoological Society of London, and his resignation from the Council of the Zoological Society
Letters from Rajendra Mullick to Philip Lutley Sclater regarding the arrival of the steamer 'Hydaspes' with herds and animals from the Zoological Society of London
Letters from August von Pelzeln to Philip Lutley Sclater
Letters from Sir Robert Lambert Playfair to Philip Lutley Sclater regarding a Mr Robert H Rippon or Rippin, and articles in the Proceedings of the Zoological Society of London
Letters from Morton Allport to Philip Lutley Sclater about the introduction of salmon to the waters of Tasmania
Letters from Spencer Fullerton Baird of Washington to Philip Lutley Sclater regarding ornithology