| Regimental number | 64560 |
| Date of birth | |
| Place of birth | Malvern, Victoria |
| School | Melbourne Grammar School, Victoria |
| Religion | Church of England |
| Occupation | Student |
| Marital status | Single |
| Height | 6' 0" |
| Weight | 137 lbs |
| Next of kin | Father, Alfred Clark, Waratah, Clendon Road, Toorak, Victoria |
| Previous military service | Served for 4 years in Senior Cadets; 1 year in Melbourne University Rifles, Citizen Military Forces. |
| Enlistment date | |
| Place of enlistment | Melbourne, Victoria |
| Unit name | 6th General Service Reinforcements, Victoria (Egypt) |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board SS Port Darwin on |
| Rank from Nominal Roll | Trooper |
| Unit from Nominal Roll | 4th Light Horse Regiment |
| Fate | Returned to Australia |
| Discharge date | |
| Other details |
War service: Egypt Commenced return to Australia from Kantara on board HT 'Essex', 15 June 1919; disembarked Melbourne, 25 July 1919; discharged (termination of period of enlistment), Melbourne, 9 August 1919. Medal: British War Medal |
| Miscellaneous details | Name does not appear on Embarkation Roll. |
| Sources | NAA: B2455, CLARK Hamilton Warren |