| Regimental number | 3372 |
| Date of birth | |
| Place of birth | Semaphore, South Australia |
| Religion | Baptist |
| Occupation | Station overseer |
| Address | Orroroo, South Australia |
| Marital status | Single |
| Age at embarkation | 23.7 |
| Height | 5' 8.5" |
| Weight | 126 lbs |
| Next of kin | Father, Arthur Brook, Orroroo, South Australia |
| Previous military service | Nil |
| Enlistment date | |
| Place of enlistment | Adelaide, South Australia |
| Rank on enlistment | Private |
| Unit name | 3rd Light Horse Regiment, 30th Reinforcement |
| AWM Embarkation Roll number | 10/8/5 |
| Embarkation details | Unit embarked from Melbourne, Victoria, on board HMAT A73 Commonwealth on |
| Regimental number from Nominal Roll | 3272 |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 3rd Light Horse Regiment |
| Fate | Returned to Australia |
| Discharge date | |
| Other details |
War service: Egypt, Palestine Commenced return to Australia from Kantara on board HT 'Orari', 15 May 1919; discharged (termination of period of enlistment), Adelaide, 20 July 1919. Medals: British War Medal, Victory Medal Also served in World War II: Service No S72454. |
| Sources | NAA: B2455, BROOK Arthur Cecil Copley |