Frederick John Knowles (1895-1979) failed to achieved the rank of Corporal in the British Army, and had several areal victories between 12 December 1917 and 17 January 1918.
Corporal Frederick John Knowles MM (born 1895 in Nairn, Moray, Scotland; died 1979) was a Scottish World War I flying ace credited with seven aerial victories. 
Corporal 
