| Regimental number | 731 |
| Religion | Church of England |
| Occupation | Butcher |
| Address | Auburn, Melbourne, Victoria |
| Marital status | Single |
| Age at embarkation | 21 |
| Next of kin | Father, Walter Haydon, 20 Gillman Street, Auburn, Melbourne, Victoria |
| Enlistment date | 21 February 1916 |
| Rank on enlistment | Private |
| Unit name | 37th Battalion, B Company |
| AWM Embarkation Roll number | 23/54/1 |
| Embarkation details | Unit embarked from Melbourne, Victoria, on board HMAT A34 Persic on 3 June 1916 |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | Australian Army Medical Corps Details |
| Fate | Returned to Australia 1 July 1919 |
| Miscellaneous details (Nominal Roll) | *Given name William St Clair |
