Correspondence between Carl Hagenbeck and George Soper Cansdale regarding a list of animals that the Zoological Society of London were willing to let Hagenbeck have in exchange against the specimens house in London Zoo
Letters from Carl Hagenbeck to Philip Lutley Sclater regarding his catalogue of animals for sale to the Zoological Society of London, and an order from the British government for the supply of dromedaries
Correspondence with Carl Hagenbeck regarding the transport of animals on loan between Tierpark in Hamburgh-Stellingen and London Zoo
Correspondence with Carl Hagenbeck regarding an exchange of Geese and Darwin's Rheas with the Zoological Society of London
Letters from Ernst Heinrich Philipp August Haeckel to Philip Lutley Sclater
Biopsies, Referrals etc. Includes specimens from outside ZSL. Lists Date, Histology number, Reference number, Source, Species, Tissues, Comments, Reported
Correspondence between H Markham Cook Ltd and Geoffrey Marr Vevers the Ministry of Food Zoning Scheme and the percentage of fish allocated to H Markham Cook Ltd