| Regimental number | 6182 |
| Place of birth | Bulli, New South Wales |
| Religion | Methodist |
| Occupation | Telephonist |
| Address | 64 Margaret Street, Petersham, New South Wales |
| Marital status | Single |
| Age at embarkation | 20 |
| Height | 5' 7.25" |
| Weight | 126 lbs |
| Next of kin | Father, William George Seabrook, 64 Margaret Street, Petersham, New South Wales |
| Previous military service | Served in Commonwealth Cadets as 2Lt; 1st Lt in AIF training soldiers for the Front. |
| Enlistment date | |
| Place of enlistment | Holsworthy, New South Wales |
| Rank on enlistment | Private |
| Unit name | 17th Battalion, 17th Reinforcement |
| AWM Embarkation Roll number | 23/34/3 |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board HMAT A11 Ascanius on |
| Regimental number from Nominal Roll | Commissioned |
| Rank from Nominal Roll | 2nd Lieutenant |
| Unit from Nominal Roll | 17th Battalion |
| Fate | Died of wounds |
| Place of death or wounding | Ypres, Belgium |
| Age at death | 21 |
| Age at death from cemetery records | 21 |
| Place of burial | Lijssenthoek Military Cemetery (Plot XXIII, Row B, Grave No. 5), Belgium |
| Panel number, Roll of Honour, Australian War Memorial | 84 |
| Miscellaneous information from cemetery records | Parents: William and Fanny SEABROOK, Great North Road, Five Dock, Sydney, New South Wales |
| Family/military connections | Brothers: 6147 Pte Theo. Leslie SEABROOK, 17th Bn, killed in action, 20 September 1917; 6174 Pte George Ross SEABROOK, 17th Bn, killed in action, 20 September 1917. |
| Other details |
War service: Western Front Medals: British War Medal, Victory Medal |
| Sources | NAA: B2455, SEABROOK William Keith |