Correspondence between W Hopkinson and George Soper Cansdale regarding an enquiry from the Zoological Gardens Board of Western Australia in connection with the offer they had received from Poly-Zoo Ltd of Antwerp, for the supply of a pair of Polar Bears

Correspondence between Antwerp Zoo and Geoffrey Marr Vevers regarding an exchange of animals between the Zoological Society of London and Antwerp Zoo, and a paper called 'Notes about our attempt to present snakes separated from the public by an invisible obstacle'

Correspondence between the Zoo-Centre in Brussels and Geoffrey Marr Vevers regarding the transfer of birds and Wallabies

Letter from Antwerp Zoo, with papers on Consideration Upon the Necessity of Coordinating All Observations Taken on Okapis Living in Captivity, and Ways in Exhibiting Birds in Cages