| Regimental number | 2584 |
| Date of birth | |
| Place of birth | Narrandera, New South Wales |
| Religion | Church of England |
| Occupation | Clerk |
| Address | Narrandera, New South Wales |
| Marital status | Single |
| Age at embarkation | 19 |
| Next of kin | Father, Thomas Henry Elwin, Narrandera, New South Wales |
| Enlistment date | |
| Date of enlistment from Nominal Roll | |
| Rank on enlistment | Private |
| Unit name | 1st Battalion, 8th Reinforcement |
| AWM Embarkation Roll number | 23/18/2 |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board HMAT A54 Runic on |
| Rank from Nominal Roll | Warrant Officer (Class I) |
| Unit from Nominal Roll | 53rd Battalion |
| Fate | Returned to Australia |
| Miscellaneous details (Nominal Roll) | *Harold Penrose stated as given name on Nominal Roll |
| Miscellaneous information from cemetery records | Plaque in New South Wales Garden of Remembrance |
| Other details | Died at home, "Wooyeo", Lake Cargelligo, NSW |
| Date of death | |
| Place of burial | Lake Cargelligo Cemetery. NSW |