Simon Glancey has submitted he following:
F/O Clarke was killed when de Havilland Mosquito FB. Mk. IV DZ515 of 139 Squadron was lost on a mission to Berlin. The Mosquito, part of the Pathfinder Force, was lost without trace with both crew members.
Royal Air Force Bomber Command Losses of the Second World War: 1943;W.R. Chorley; 1996; Midland Counties Publications; ISBN 0 904597 90 3, page 232
He is remembered in Berwick on Tweed on B25.23
