| Date of birth | |
| Place of birth | Kew, Victoria |
| Religion | Congregational |
| Occupation | Salesman |
| Address | Lauriston, Molesworth Street, Kew, Victoria |
| Marital status | Single |
| Age at embarkation | 23 |
| Next of kin | Father, G W St Clair, Lauriston, Molesworth Street, Kew, Victoria |
| Previous military service | 25th Battery Australian Field Artillery |
| Enlistment date | |
| Rank on enlistment | Captain |
| Unit name | Field Artillery Brigade 4, Ammunition Column |
| AWM Embarkation Roll number | 13/32/1 |
| Embarkation details | Unit embarked from Melbourne, Victoria, on board HMAT A18 Wiltshire on |
| Rank from Nominal Roll | Lieutenant-Colonel |
| Unit from Nominal Roll | 2nd Division Artillery |
| Promotions |
Major Unit: 2nd Division Artillery Promotion date: |
| Recommendations (Medals and Awards) |
Mention in Despatches Awarded, and promulgated, 'London Gazette' No. 30706 (28 May 1918); 'Commonwealth Gazette' No. 165 (24 October 1918). Mention in Despatches Awarded, and promulgated, 'London Gazette', second Supplement, No. 29890 (2 January 1917); 'Commonwealth Gazette' No. 103 (29 June 1917). |
| Fate | Returned to Australia |
| Medals |
Distinguished Service Order Source: 'Commonwealth Gazette' No. 103 Date: |
| Discharge date | |
| Other details |
War service: Egypt, Gallipoli, Western Front Commenced return to Australia on board HT 'Zealandia', 11 May 1919; appointment terminated (discharged), Melbourne, 16 September 1919. Medals: Distinguished Service Order, 1914-15 Star, British War Medal, Victory Medal Also served in World War II: Service No VX108045. |
| Date of death | |
| Age at death | 85 |
| Sources | NAA: B883, ST CLAIR William Howard |