| Regimental number | 2926 |
| Place of birth | Alma Plains, South Australia |
| Religion | Methodist |
| Occupation | Farmer |
| Address | Parilla, South Australia |
| Marital status | Single |
| Age at embarkation | 18 |
| Height | 5' 4.75" |
| Weight | 120 lbs |
| Next of kin | Mother, Mrs Annie Ethel Heaft, Bourke Street, Kilkenny, South Australia |
| Previous military service | Nil (exempt area under Compulsory Military Training scheme) |
| Enlistment date | |
| Place of enlistment | Adelaide, South Australia |
| Rank on enlistment | Private |
| Unit name | 50th Battalion, 7th Reinforcement |
| AWM Embarkation Roll number | 23/67/3 |
| Embarkation details | Unit embarked from Adelaide, South Australia, on board HMAT A19 Afric on |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 50th Battalion |
| Fate | Returned to Australia |
| Other details |
War service: Western Front Medals: British War Medal, Victory Medal |
| Miscellaneous details | Originally enlisted, 14 June 1915; discharged as medically unfit for further service, 5 October 1915; re-enlisted, 7 September 1916. |
| Date of death | |
| Sources | NAA: B2455, HEAFT Oswald Douglas |