List of American zoos by A Lindsay; Report of a visit to New York and Chicago (1936); 'Notes on visits to some foreign zoos, 1934 and 1935' by Huxley (covering New York Bronx, Philadelphia, Washington, Paris Vincennes, Hamburg, Berlin, Munich Hellabrun, & Frankfurt); extract from report on the British Colonial Exhibit, World's Fair, New York, 1939; Report on visit to Austria and Germany by D Seth Smith (c1937); Report on a visit to the Zoological Gardens at Antwerp, Rotterdam and Amsterdam (1935); Report on a visit to France (1938); letter from Chalmers Mitchell to the Directors of Zoological Gardens in Germany, introducing Huxley, 1935; handwritten notes on zoos; notebook; 'La Reproduction des Animaux Sauvages en Captivite' by A Urbain; Report on visit to Brookfield Zoo (1940); guide to Internationalen Jagdaustellung, Berlin, 1937.

Correspondence between Rotterdam Zoo and George Soper Cansdale regarding the exchange of animals between Rotterdam Zoo and the Zoological Society of London

Correspondence between Rotterdam Zoo and Geoffrey Marr Vevers regarding the building of aviaries in Rotterdam Zoological Park, the offer of Mangabey Monkeys from the Zoological Society of London, and a subscription to Zoo Life

Letters from G F Westerman, Director of the Zoological Gardens of the Society Natura Artis Magistra in Amsterdam, to Philip Lutley Sclater regarding a payment from the Zoological Society of London and the exchange of animals