
| Regimental number | 575 |
| Place of birth | Nagambie, Victoria |
| Religion | Roman Catholic |
| Occupation | State school teacher |
| Address | 90 Edgevale Road, Kew, Victoria |
| Marital status | Single |
| Age at embarkation | 22 |
| Next of kin | Father, Albert Edward Brook, Police Station, Kew, Melbourne, Victoria |
| Enlistment date | |
| Rank on enlistment | Private |
| Unit name | 1st Battalion, E Company |
| AWM Embarkation Roll number | 23/18/1 |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board Transport A19 Afric on |
| Regimental number from Nominal Roll | Commissioned |
| Rank from Nominal Roll | Lieutenant |
| Unit from Nominal Roll | 1st Battalion |
| Promotions |
2nd Lieutenant Unit: INF1 Promotion date: Lieutenant Unit: INF1 Promotion date: |
| Fate | Returned to Australia |
| Family/military connections | Brother: Arthur O'Connor BROOK, 3rd Squadron, Australian Flying Corps, killed in action, Amiens, France, 26 June 1918. |