Son of Fred and Madeleine I. Ellis Clarke, of Springs, Transvaal, South Africa.
LG Sup 16 March 1945 pg. 1446 - "This officer has completed very many sorties on his second tour of operational duty. During these operations he has taken part in attacks on a variety of targets and has been responsible for putting out of action very many mechanical vehicles, a number of locomotives and many railway wagons; in air combat, Captain Clarke has shot down 3 enemy aircraft. In January, 1945, this officer flew with great distinction in a sortie during which the railway bridge at Roveredo was successfully attacked; a nearby road bridge was also effectively attacked. This officer has displayed great skill, courage and resource and his exceptional work has contributed in good measure to the success of the squadron."