| Regimental number | 1278 |
| Place of birth | Penrith, New South Wales |
| School | Penrith Superior Public School, New South Wales |
| Religion | Presbyterian |
| Occupation | Shop assistant |
| Address | Penrith, New South Wales |
| Marital status | Single |
| Age at embarkation | 21 |
| Next of kin | Father, Robert Mills, High Street, Penrith, New South Wales |
| Previous military service | Served in the Cadets and in the Citizen Military Forces, Penrith, New South Wales (rank of Corporal). |
| Enlistment date | |
| Rank on enlistment | Corporal |
| Unit name | 36th Battalion, D Company |
| AWM Embarkation Roll number | 23/53/1 |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board HMAT A72 Beltana on |
| Rank from Nominal Roll | Corporal |
| Unit from Nominal Roll | 3rd Trench Mortar Battery |
| Fate | Killed in Action |
| Age at death | 22.6 |
| Age at death from cemetery records | 22 |
| Place of burial | Nieppe Communal Cemetery (Plot II, Row A, Grave No. 7), France |
| Panel number, Roll of Honour, Australian War Memorial | 20 |
| Miscellaneous information from cemetery records | Parents: Robert and Elizabeth MILLS, High Street, Penrith |
| Family/military connections | Cousins: 4133 Lance Corporal Frederick Charles HARRIS MM, 22nd Bn, returned to Australia, 3 January 1919; Lt Harold Robert HARRIS, 14th Bn, killed in action, 8 August 1915; 1554 Pte Arthur John HARRIS, 39th Bn, returned to Australia, 20 January 1919.~ |
| Other details |
War service: Western Front Medals: British War Medal, Victory Medal |