Notes by Julian Huxley on visits to the Zoological Gardens at New York (Bronx Park), Philadelphia, Washington DC, Paris (Vincennes), Hamburg, Berlin, Munich (Hellabrunn) and Frankfort, also the Aquarium at Chicago

Correspondence with the Royal Society for the Prevention of Cruelty to Animals regarding statements on the capture and confinement of wild animals

Letter from Arthur F Astley to Philip Lutley Sclater regarding the subject of reptile feeding at the Zoo

Correspondence between Mrs F Edwards and Julian Sorell Huxley regarding principles of keeping animals in captivity

Correspondence between G Kenneth Whitehead and George Soper Cansdale regarding the stock of Muntjac at London and Whipsnade Zoos

Minutes of the Breeding Policy Committee, later the Committee of the Wellcome Institute of Comparative Physiology, of the Zoological Society of London

Correspondence regarding conservation and the Breeding Policy Committee, later the Committee of the Wellcome Institute of Comparative Physiology, of the Zoological Society of London

Memos of the Breeding Policy Committee, later the Committee of the Wellcome Institute of Comparative Physiology, of the Zoological Society of London

Correspondence of the Breeding Policy Committee of the Zoological Society of London