| Regimental number | 20693 |
| Place of birth | Sydney New South Wales |
| Religion | Church of England |
| Occupation | Engineer student |
| Address | Sydney, New South Wales |
| Marital status | Single |
| Age at embarkation | 20 |
| Next of kin | Father, Greville Tregarthen, Navy Office, Melbourne, Victoria |
| Enlistment date | 23 July 1917 |
| Rank on enlistment | Sapper |
| Unit name | October 1917 Reinforcements |
| AWM Embarkation Roll number | 14/42/3 |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board SS Canberra on 16 November 1917 |
| Rank from Nominal Roll | Sapper |
| Unit from Nominal Roll | 15th Field Company Engineers |
| Fate | Returned to Australia 9 March 1919 |
