Lectures and addresses: correspondence Small collection of correspondence relating to Lockhart's lecturing engagements, 1930s - 1970s, principally letters of thanks from organisations to whom he spoke. Includes syllabus of Aberdeen and Workers' Educational Association, 1938 - 1939 (speakers include Doctors Mary Esslemont, Alexander Lyall, Hans Kosterlitz); letter of thanks from the Association of Teachers of The Chartered Society of Massage and Medical Gymnastics, 25 May 1938; correspondence with the 'A' Company Girls' Training Corps, Aberdeen, 1942 - 1943; correspondence with the Regional Committee for Education in H.M. Forces, Aberdeen, October 1944. 1930s - 1970s