| Regimental number | 222 |
| Place of birth | Sale Victoria |
| Religion | Church of England |
| Occupation | Dairy farmer |
| Address | 5 Albert Street, Hawthorn, Victoria |
| Marital status | Single |
| Age at embarkation | 36 |
| Next of kin | Mother, Mrs Maria Irwin, 5 Albert Street, Hawthorn, Victoria |
| Enlistment date | 26 January 1916 |
| Rank on enlistment | Private |
| Unit name | 3rd Pioneer Battalion, A Company |
| AWM Embarkation Roll number | 14/15/1 |
| Embarkation details | Unit embarked from Melbourne, Victoria, on board HMAT A62 Wandilla on 6 June 1916 |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 3rd Pioneer Battalion |
| Fate | Returned to Australia 27 September 1919 |
| Miscellaneous details (Nominal Roll) | *Spelt Harry Seward Irwin on NR |
