Letters from Wilhelm Carl Hartwig Peters of the Museum Regium Zoologicum, to Philip Lutley Sclater regarding Huxley's paper, a sketch of the plan of the monkey house, plates, specimens in his possession, and his memoirs

Letters from Edward Pierson Ramsay, Curator of the Australian Museum, to Philip Lutley Sclater regarding the transportation of a ceratodus to the Zoological Society of London

Edward George Boulenger spent three weeks in America where he visited and studied the aquaria, zoological parks and museums in New York and Chicago

Letters from Edmund Ruppell, a German citizen from Frankfort, giving appreciation for receipt of his diploma as a foreign member of the Zoological Society of London, Proceedings of the Zoological Society of London, comments on his discoveries such as a new variety of Gasteropod, a list of mammals and birds 'our museum wishes to get from England' receipt of the 1934 Proceedings, the first volume of museum catalogue, and his wish to complete the exchange

Letter from Karl Schmidt, Assistant Curator of Reptiles and Amphibians at the Field Museum of Natural History, regarding Procter leaving the British Museum and accepting an appointment at the Zoological Society of London

Letter from the Sunday Opening Joint Deputation to Philip Lutley Sclater regarding the opening of museums, art galleries and libraries on Sundays

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

Correspondence between W H T Tams of the British Museum (Natural History) and the Zoological Society of London regarding the biography of Dr C Davies Sherborn