After school, Theodore studied Law at the University of Sydney and worked for Marcus Clark Ltd. He got married to Kathleen Crossing in 1941 and they had a son. He enlisted in the Royal Australian Air Force in 1940 and sadly, was a casualty of war in January 1942. He is remembered on the OKGA War Memorial.
Since 1945, the T Marcus Clark Memorial Prize for the Captain of Cricket has been awarded on Speech Day. In 1993, he was remembered in the OKGA Honouring Service.
His cousin John Byron Marcus Clark (OKG33) attended the School and is remembered on the OKGA War Memorial.
War Service
1940-1942 Royal Australian Air Force 402310
Flying Officer
Mechanical Equipment Park Company