Papers relating to his service in the RAF, [1939-1945], 1948, principally comprising official photographs of radar installations, [1939-1945] and RAF operations rooms, [1939-1945], including photograph of operations room of HQ Fighter Command, RAF Bentley Priory, Stanmore, Middlesex, 1939; typescript notes and diagrams about layout and organisation of RAF sector controloperations rooms, [1939-1945]; official photographs of [RAF station], Wunstorf, Germany, 1948.