| Regimental number | 15756 |
| Date of birth | |
| Place of birth | Sydney, New South Wales |
| Religion | Church of England |
| Occupation | Coppersmith |
| Address | Balmain, New South Wales |
| Marital status | Single |
| Age at embarkation | 20.1 |
| Height | 5' 5.5" |
| Weight | 114 lbs |
| Next of kin | Mother, Mrs Florence Nightingale Lucas, 1 Theodore Street, Balmain, Sydney, New South Wales |
| Previous military service | Served for 3 years in the Senior Cadets. |
| Enlistment date | |
| Date of enlistment from Nominal Roll | |
| Place of enlistment | Sydney, New South Wales |
| Rank on enlistment | Driver |
| Unit name | October 1916 Reinforcements |
| AWM Embarkation Roll number | 14/42/2 |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board HMAT A74 Marathon on |
| Rank from Nominal Roll | Driver |
| Unit from Nominal Roll | 10th Field Company Engineers |
| Fate | Returned to Australia |
| Discharge date | |
| Other details |
War service: Western Front Commenced return to Australia on board HT 'Orca', 19 February 1919; discharged (medically unfit), Sydney, 18 May 1919. Medals: British War Medal, Victory Medal Also served in World War II: Service No N177276. |
| Sources | NAA: B2455, LUCAS Sydney William |