| Regimental number | 669 |
| Place of birth | Richmond, Victoria |
| Religion | Roman Catholic |
| Occupation | Clerk |
| Address | 53 Tanner Street, Richmond, Victoria |
| Marital status | Single |
| Age at embarkation | 21 |
| Next of kin | Father, Joh Cahir, 53 Tanner Street, Richmond, Victoria |
| Enlistment date | |
| Date of enlistment from Nominal Roll | |
| Rank on enlistment | Private |
| Unit name | 13th Light Horse Regiment, 1st Reinforcement |
| AWM Embarkation Roll number | 10/18/2 |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board HMAT A40 Ceramic on |
| Rank from Nominal Roll | Sapper |
| Unit from Nominal Roll | 5th Divisional Signal Company |
| Fate | Returned to Australia |
| Miscellaneous details (Nominal Roll) | *Stated to be James Ignatius Cahir on NR |
| Other details |
Medals: 1914-15 Star, British War Medal, Victory Medal |