| Regimental number | 2493 |
| Place of birth | Adelaide, South Australia |
| Religion | Methodist |
| Occupation | Labourer |
| Address | Jamestown, South Australia |
| Marital status | Single |
| Age at embarkation | 25 |
| Height | 5' 2" |
| Weight | 126 lbs |
| Next of kin | Mother, Mrs Louisa St Arnaud, Forrestville, South Australia |
| Previous military service | Nil |
| Enlistment date | |
| Place of enlistment | Jamestown, South Australia |
| Rank on enlistment | Private |
| Unit name | 48th Battalion, 5th Reinforcement |
| AWM Embarkation Roll number | 23/65/3 |
| Embarkation details | Unit embarked from Adelaide, South Australia, on board HMAT A68 Anchises on |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 2nd Division Train |
| Fate | Returned to Australia |
| Discharge date | |
| Other details |
Commenced return to Australia on board HT 'Orontes', 20 December 1919; arrived Melbourne, 30 January 1919, for onward travel to Adelaide; discharged (medically unfit), Adelaide, 4 May 1919. Medals: British War Medal, Victory Medal |
| Miscellaneous details | Name does not appear on Embarkation Roll. |
| Date of death | |
| Sources | NAA: B2455, ST ARNAUD William Alfred |