| Place of birth | Christchurch, New Zealand |
| Religion | Church of England |
| Occupation | Civil servant |
| Address | Sydney, New South Wales |
| Marital status | Single |
| Age at embarkation | 48 |
| Next of kin | Brother, Dr W G Armstrong, 'Mangerton', Roslyn Gardens, Darlinghurst, New South Wales |
| Enlistment date | 30 September 1915 |
| Rank on enlistment | QM & HON LT |
| Unit name | 2nd Casualty Clearing Station |
| Embarkation details | Unit embarked from Melbourne, Victoria, on board HMAT A40 Ceramic on 23 November 1915 |
| Rank from Nominal Roll | Captain |
| Unit from Nominal Roll | Australian Army Medical Corps |
| Fate | Effective abroad (still overseas) |
| Miscellaneous details | See also Tandres de Caberet ARMSTRONG |
