Frank Mason was the son of Edward and Ellen Mason of 51 Canon Street and was born in Winchester. He joined the 8th Battalion of the Rifle Brigade, mostly volunteers who joined at the start of the war. His army number was S/14400. The actions of the battalion fell under the control of the 14th Light Division.

He rose to Lance Corporal, and is listed as Killed in Action on the Thiepval memorial, dying on 15th September 1916. As the battalion saw action in the bloody fighting around Flers-Courcelette, the guess is that Frank was killed here, and that his body, like 70,000 other Allied soldiers, was never found.