| Regimental number | 8/2610 |
| Address | 28 Russell Street, Dunedin |
| Marital status | Single |
| Next of kin | Brother, D Hartnett, Criterion Boardinghouse, Wanganui |
| Rank on embarkation | Private |
| Enlistment status | Volunteer |
| Unit name | New Zealand Expeditionary Force, 6th Reinforcement, Otago Infantry Battalion |
| Embarkation details | Unit embarked from Wellington on board Willochra on |
| Final rank | Lance Corporal |
| Final unit | Canterbury Infantry Regiment |
| Fate | Drowned at sea |
| Age at death from cemetery records | 30 |
| Place of burial | No known grave |
| Miscellaneous information from cemetery records | Parents: the late Patrick and Mary Hartnett. Born at Deloraine, Tasmania, Australia |
| Miscellaneous details | Nominal Roll Vol. 1: Otago Infantry Batln/Sixth |