| Regimental number | 5388 |
| Religion | Roman Catholic |
| Occupation | Baker |
| Address | 14 Campbell Street, Sydney, New South Wales |
| Marital status | Single |
| Age at embarkation | 26 |
| Next of kin | Father, Patrick O'$eilly, Balley James Duff, County Cavan, Ireland |
| Enlistment date | 15 November 1915 |
| Rank on enlistment | Private |
| Unit name | 20th Battalion, 14th Reinforcement |
| AWM Embarkation Roll number | 23/37/3 |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board HMAT A18 Wiltshire on 22 August 1916 |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 20th Battalion |
| Fate | Effective abroad (still overseas) |
