| Regimental number | 1703 |
| Place of birth | Fremantle Western Australia |
| Religion | Church of England |
| Occupation | Mill hand |
| Address | Serpentine, Western Australia |
| Marital status | Single |
| Age at embarkation | 18 |
| Next of kin | Father, Charles Firns, Serpentine, Western Australia |
| Enlistment date | 16 June 1915 |
| Rank on enlistment | Private |
| Unit name | 28th Battalion, 2nd Reinforcement |
| AWM Embarkation Roll number | 23/45/2 |
| Embarkation details | Unit embarked from Fremantle, Western Australia, on board HMAT A64 Demosthenes on 23 July 1915 |
| Regimental number from Nominal Roll | 1703A |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 28th Battalion |
| Fate | Returned to Australia 16 January 1919 |
| Family/military connections | Brother: 2291 Driver George Weston FIRNS, 48th Bn, returned to Australia, 28 February 1919. |