Letter from Richard Kippist, the Librarian of the Linnean Society of London, to Philip Lutley Sclater regarding the costs of meeting for scientific business at the Linnean Society
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
Letter from Martha King to Philip Lutley Sclater regarding her subscription to the Zoological Society of London
Letters from J L Kier, building and civil engineering contractors, to Julian Sorell Huxley regarding timelines for the construction of buildings at London Zoo
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
Letter from Otto Kersten to Philip Lutley Sclater regarding his East African exploring project
Letter from W A Kerr to Philip Lutley Sclater resigning from the Fellowship of the Zoological Society of London
Letters from Sir John Graham Kerr to Philip Lutley Sclater regarding lists of birds, his degree course, his collection of birds, and papers
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 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