| Regimental number | 3125 |
| Place of birth | Staffordshire, England |
| Religion | Church of England |
| Occupation | Farmer |
| Address | Westonia, Western Australia |
| Marital status | Single |
| Age at embarkation | 27 |
| Height | 5' 8" |
| Weight | 144 lbs |
| Next of kin | Father, William Brain, Staffordshire, England |
| Previous military service | Nil |
| Enlistment date | |
| Place of enlistment | Blackboy Hill, Western Australia |
| Rank on enlistment | Private |
| Unit name | 48th Battalion, 8th Reinforcement |
| Embarkation details | Unit embarked from Fremantle, Western Australia, on board HMAT A35 Berrima on |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 48th Battalion |
| Fate | Returned to Australia |
| Miscellaneous information from cemetery records | Plaque in Western Australia Garden of Remembrance |
| Discharge date | |
| Other details |
War service: Western Front Commenced return to Australia on board HT 'Khyber', 31 March 1919; disembarked Fremantle, 23 May 1919; discharged (termination of period of enlistment), Fremantle, 30 June 1919. Medals: British War Medal, Victory Medal |
| Miscellaneous details | Name does not appear on Embarkation Roll. |
| Date of death | |
| Sources | NAA: B2455, BRAIN William Henry |