| Date of birth | |
| Place of birth | Sydney, New South Wales |
| School | All Saints College, Bathurst, New South Wales |
| Religion | Church of England |
| Occupation | Mining engineer |
| Address | Annandale, New South Wales |
| Marital status | Single |
| Age at embarkation | 27 |
| Height | 5' 8" |
| Weight | 150 lbs |
| Next of kin | Father, John L Clark, View and Piper Streets, Annandale, New South Wales |
| Enlistment date | |
| Rank on enlistment | 2nd Lieutenant |
| Unit name | Australian Flying Corps, No 42 Squadron, Military District Officers |
| AWM Embarkation Roll number | 8/7/1 |
| Embarkation details | Unit embarked from Melbourne, Victoria, on board RMS Omrah on |
| Rank from Nominal Roll | Lieutenant |
| Unit from Nominal Roll | 4th Squadron, Australian Flying Corps |
| Fate | Returned to Australia |
| Miscellaneous details (Nominal Roll) | No details of fate entered on Nominal Roll. |
| Discharge date | |
| Other details |
War service: Western Front Wounded in action, 3 January 1918 (crushed/fractured right foot); transferred to England, 25 January 1918, and admitted to 3rd London General Hospital, Wandsworth; discharged to duty, 17 March 1918. Married Gladys K.A. STRAND, spinster, aged 27, Anglican Church, Gloucester, 18 October 1919. Commenced return to Australia on board HT 'Ypiringa', 15 November 1919; disembarked sydney, 4 January 1920; appointment terminated (discharged), Sydney, 1 March 1920. Medals: British War Medal, Victory Medal |
| Sources | NAA: B2455, CLARK Robert Leeuwin |