| Regimental number | 520 |
| Religion | Church of England |
| Occupation | Clerk |
| Address | Casterton, Victoria |
| Marital status | Single |
| Age at embarkation | 23 |
| Next of kin | Mother, Mrs M C O'Neill, 30 Grant Street, Clifton Hill, Victoria |
| Enlistment date | 16 March 1915 |
| Rank on enlistment | Private |
| Unit name | 22nd Battalion, B Company |
| AWM Embarkation Roll number | 23/39/1 |
| Embarkation details | Unit embarked from Melbourne, Victoria, on board HMAT A38 Ulysses on 10 May 1915 |
| Rank from Nominal Roll | Corporal |
| Unit from Nominal Roll | 22nd Battalion |
| Fate | Returned to Australia 10 September 1917 |
| Miscellaneous details (Nominal Roll) | *Stated to be Lawrence Thayer O'Neill on NR |
