| Regimental number | 3794 |
| Date of birth | |
| Place of birth | London, England |
| Religion | Church of England |
| Occupation | Architect |
| Address | Glenelg, South Australia |
| Marital status | Single |
| Age at embarkation | 34 |
| Height | 5' 8.75" |
| Weight | 130 lbs |
| Next of kin | Mother, Mrs S Lucas, 59 Weltte Road, Hammersmith, London, England |
| Previous military service | Nil |
| Enlistment date | |
| Place of enlistment | Adelaide, South Australia |
| Rank on enlistment | Private |
| Unit name | 5th Pioneer Battalion, Reinforcement 10 |
| AWM Embarkation Roll number | 14/17/4 |
| Embarkation details | Unit embarked from Melbourne, Victoria, on board HMAT A60 Aeneas on |
| Rank from Nominal Roll | Sergeant |
| Unit from Nominal Roll | 5th Pioneer Battalion |
| Fate | Returned to Australia |
| Discharge date | |
| Other details |
War service: Western Front Commenced return to Australia on board HT 'Freidrichsruh', 8 July 1919; discharged (termination of period of enlistment), Adelaide, 21 September 1919. Medals: British War Medal, Victory Medal Also served in World War II: Service No SX27831. |
| Sources | NAA: B2455, LUCAS William |