Correspondence between John Houston, David William Mitchell and the South Australian Banking Company regarding the sale of birds and a request by Prince Albert to bring a Platypus, Lyre Tailed Pheasant and Black Mackaw to the Zoological Society of London
Correspondence with Prudence Howard regarding the mating of Chi-Chi and An-An
Correspondence between Dr J Richard Hudson and Geoffrey Marr Vevers regarding a young giraffe named Twiga which was sent to the Zoological Society of London from the Veterinary Research Laboratory in Kabete, Kenya
Letters from William Henry Hudson to Philip Lutley Sclater regarding cuckoos, shipments of birds to the Smithsonian, Woodpeckers in Argentina, Blackbirds and other birds
Letter from William Henry Hudson to Peter Chalmers Mitchell enclosing a copy of Birds of La Plata for the Library of the Zoological Society of London
Letters from Martin Theodor von Hueglin to Philip Lutley Sclater regarding his departure for Spitzbergen and his treasures of the three natural kingdoms