 He taught fitness, diet and survival techniques, many of which were published in his 1944 training manual "Hardening of Commando Troops for Warfare".He was one of the consultants for Operation Tracer; in the event that Gibraltar was taken by the Axis powers, a small party was to be sealed into a secret chamber in the Rock of Gibraltar to report enemy movements.At the time of his death, Major D. Glyn Owen, chairman of the British Exploring Society wrote