| Date of birth | |
| Place of birth | Christchurch, New Zealand |
| Other Names | Armstrong, Tanceed de Corteret |
| Other training | BA, University of Sydney, New South Wales |
| Religion | Church of England |
| Occupation | Civil servant |
| Address | Sydney, New South Wales |
| Marital status | Single |
| Age at embarkation | 48 |
| Height | 5' 4" |
| Weight | 137 lbs |
| Next of kin | Brother, Dr W G Armstrong, 'Mangerton', Roslyn Gardens, Darlinghurst, New South Wales |
| Previous military service | Served as Lieutenant, Senior Cadets, 25th Bn. |
| Enlistment date | |
| 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 |
| Rank from Nominal Roll | Captain |
| Unit from Nominal Roll | Australian Army Medical Corps |
| Fate | Returned to Australia |
| Discharge date | |
| Other details |
War service: Egypt, Western Front Commenced return to Australia on board HT 'Hororata', 16 April 1920; disembarked Sydney, 18 June 1920; appointment terminated (discharged), Sydney, 22 August 1920. |
| Miscellaneous details | Given names incorrectly entered on Embarkation Roll as Tandres de Caberet. |
| Sources | NAA: B2455, ARMSTRONG Tancred de Carteret |