Career
In 1917 Mason was a Corporal in the Royal Flying Corps, serving as an observer/gunner in Number. 11 Squadron, flying the Bristol F.2b two-seater fighter. His first aerial victory came on 8 June, with Captain Richard Raymond-Barker as his pilot, when he drove down out of control an Albatros Doctorate.III over Bohain.
On 14 August he drove down an Albatros Doctorate.V over Brebières, and on 21 October accounted for three Doctorate.Vs over Boiry–Lécluse, with pilot Lieutenant Ronald Mauduit on both occasions.
In November 1917 he was awarded the.