| Regimental number | 3426 |
| Place of birth | Fitzroy Victoria |
| Religion | Methodist |
| Occupation | Kitchenman |
| Address | Chilwell, Geelong, Victoria |
| Marital status | Single |
| Age at embarkation | 26 |
| Next of kin | Father, S Thewlis, 41 Noble Street, Chilwell, Geelong, Victoria |
| Enlistment date | 7 July 1915 |
| Rank on enlistment | Private |
| Unit name | 5th Battalion, 11th Reinforcement |
| AWM Embarkation Roll number | 23/22/2 |
| Embarkation details | Unit embarked from Melbourne, Victoria, on board HMAT A71 Nestor on 11 October 1915 |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 58th Battalion |
| Fate | Returned to Australia 10 June 1916 |
| Family/military connections | Brother: 295 Pte William Clarence THEWLIS, 13th Light Horse Regiment, returned to Australia, 5 September 1919. |