| Regimental number | 8622 |
| Place of birth | Limerick, Ireland |
| Religion | Roman Catholic |
| Occupation | Dentist |
| Address | 41 Roches Street, Limerick, Ireland |
| Marital status | Single |
| Age at embarkation | 26 |
| Height | 5' 4" |
| Weight | 126 lbs |
| Next of kin | Brother, Michael Spain, 41 Roches Street, Limerick, Ireland |
| Previous military service | Nil |
| Enlistment date | |
| Place of enlistment | Liverpool, New South Wales |
| Rank on enlistment | Private |
| Unit name | Infantry Brigade 4,Field Ambulance 5, Reinforcement 8 |
| AWM Embarkation Roll number | 26/48/2 |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board HMAT A60 Aeneas on |
| Rank from Nominal Roll | Staff Sergeant |
| Unit from Nominal Roll | Australian Army Medical Corps Details |
| Fate | Returned to Australia |
| Miscellaneous information from cemetery records | Parents: Michael and Katherine SPAIN |
| Discharge date | |
| Other details |
Commenced return to Australia on board HT 'Orontes', 15 May 1919; disembarked Sydney, 1 July 1919; disembarked (termination of period of enlistment), Sydney, 23 August 1919. Medals: British War Medal, Victory Medal Death attributed to war service. |
| Date of death | |
| Age at death | 49 |
| Place of burial | Katoomba Cemetery, New South Wales |
| Sources | NAA: B2455, SPAIN William |