| Regimental number | 64079 |
| Date of birth | |
| Place of birth | Bingara, New South Wales |
| Religion | Presbyterian |
| Occupation | Jackeroo |
| Address | Luton, Bingara, New South Wales |
| Marital status | Single |
| Age at embarkation | 19 years 6 months |
| Height | 5' 10.75" |
| Weight | 154 lbs |
| Next of kin | Father, Mr Austin Joseph Gardiner Mack, Luton, Bingara, New South Wales |
| Previous military service | Served for 4 years in Senior Cadets |
| Enlistment date | |
| Place of enlistment | Sydney, New South Wales |
| Unit name | 5th General Service Reinforcements (Egypt) (New South Wales) |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board SS Port Darwin on |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 2nd Light Horse Machine Gun Squadron |
| Fate | Returned to Australia |
| Discharge date | |
| Other details |
War service: Egypt. Commenced return to Australia on board HT 'Madras', 28 June 1919; disembarked Sydney, 3 August 1919; discharged (termination of period of enlistment), Sydney, 19 August 1919. Medal: British War Medal |
| Miscellaneous details | Name does not appear on Embarkation Roll. |
| Sources | NAA: B2455, MACK Austin McDonnall |