| Date of birth | |
| Other Names | IRWIN, John Morphett~ |
| Religion | Church of England |
| Occupation | Soldier |
| Address | Duntroon, R M C, New South Wales |
| Marital status | Single |
| Age at embarkation | 22 |
| Next of kin | Father, C Irwin, Cowra Chambers, Grenfell Street, Adelaide, South Australia |
| Previous military service | R M College |
| Enlistment date | |
| Rank on enlistment | Captain |
| Unit name | Field Artillery Brigade 7, Battery 28 |
| AWM Embarkation Roll number | 13/35/1 |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board HMAT A8 Argyllshire on |
| Rank from Nominal Roll | Lieutenant |
| Unit from Nominal Roll | 3rd Division Artillery |
| Promotions |
Major Unit: 3rd Division Artillery Promotion date: |
| Recommendations (Medals and Awards) |
Mention in Despatches Awarded, and promulgated, 'London Gazette', second Supplement, No. 30107 (1 June 1917); 'Commonwealth Gazette' No. 169 (4 October 1917). |
| Fate | Returned to Australia |