Letters from Edmund Ruppell, a German citizen from Frankfort, giving appreciation for receipt of his diploma as a foreign member of the Zoological Society of London, Proceedings of the Zoological Society of London, comments on his discoveries such as a new variety of Gasteropod, a list of mammals and birds 'our museum wishes to get from England' receipt of the 1934 Proceedings, the first volume of museum catalogue, and his wish to complete the exchange

Letters from William Nation to Philip Lutley Sclater regarding his discoveries

Letters from Albert Carl Ludwig Gotthilf Gunter to Philip Lutley Sclater regarding his papers for the Proceedings of the Zoological Society of London, Dr Gray's paper on Chilean Deer, Krefft's, discovery of the Ceratodus Fosteri, plates of Swinhoe's snakes, salmonoids, heterodon dorbignyi and euophrys modestus

Letters from Christian Anton Goering to Philip Lutley Sclater regarding his visit to Venezuela and discovery of birds of Merida