Captain Samuel Frederick Henry "Siffy" Thompson MC DFC was a World War I two-seater fighter ace who, in conjunction with his observer-gunners, was credited with 30 victories ( 18 destroyed, 12 'out of control'). He was shot down and killed in action on 27 September 1918. Despite having an active fighter career of only five months, he reached the rank of Captain and won two British military decorations.