Letters from William Saville Kent of the Museum and Institute of Pisciculture Society Limited, to Philip Lutley Sclater regarding the establishment of a marine observatory and laboratory in connection with the Brighton Aquarium, his appointment as Inspector of Fisheries to the Government of Tasmania, his application to become a Fellow of the Zoological Society of London, his inspection of the fish house, enquiries about the vacant post of Prosector, and a proposed British Zoological Station for the study of marine animals and plats with relation to the advancement of the sciences of biology and economic pisciculture
Letters from Sir Henry Keppel to Philip Lutley Sclater regarding the localities of the animals he sent to the gardens of the Zoological Society of London, and giving thanks for a card of admission to the gardens
Letters from James Kerr to Philip Lutley Sclater regarding the paper his son wrote for the Ibis, and the voyage of the Bolivia to Paraguay
Letters from Sir John Graham Kerr to Philip Lutley Sclater regarding lists of birds, his degree course, his collection of birds, and papers
Letter from W A Kerr to Philip Lutley Sclater resigning from the Fellowship of the Zoological Society of London
Letter from Otto Kersten to Philip Lutley Sclater regarding his East African exploring project
Correspondence between Eunice Kidd, Chairman of the Small Livestock Sales Sub-Committee of the Red Cross Agriculture Fund, and the Zoological Society of London regarding a poultry sale held in the Gardens
Letters from J L Kier, building and civil engineering contractors, to Julian Sorell Huxley regarding timelines for the construction of buildings at London Zoo
Letter from Martha King to Philip Lutley Sclater regarding her subscription to the Zoological Society of London
Letters from Charles Kingsley to Philip Lutley Sclater regarding naturalists in Denver, Colorado, specimens for the Zoological Society of London, and the paper of the ex-governor of Trinidad