Simon Glancey has submitted the following:
F/O Clark was killed when Avro Lancaster III ND533 EA-M of 49 Squadron was lost on a mission to bomb the rail junction at Etampes. The Lancaster crashed about 1 mile north of Rosay-sur-Lieure, with the loss of six of the seven crew. The seventh member of the crew, F/O P. D. Hemmens, was taken Prisoner of War, and died at Buchenwald Concentration Camp.
Royal Air Force Bomber Command Losses of the Second World War: 1944; W.R. Chorley; 1997; Midland Counties Publications; ISBN 0 904597 91 1, page 269
Hilary Daniel Clark is remembered in Aykley Heads on A41.02, at Burnopfield on B155.01, at Byermoor on B158.02 and at Houghton-le-Spring on H132.03
