Letter from Geoffrey Marr Vevers to Dr M Mazels enclosing tickets for admission to London Zoo and Whipsnade Zoo following his assistance in the chemical examination of the blood of a Giraffe

Letters from Sir Francis Galton to Philip Lutley Sclater on subjects including blood transfusion instruments that had been adapted for rabbits

Minutes and reports of the Prosector and Honorary Parasitologist for the Prosectorial Committee of the Zoological Society of London. Also a report on blood slides received from the Zoological Gardens