| Regimental number | 5743 |
| Place of birth | Perth, Western Australia |
| School | State School, Western Australia |
| Religion | Methodist |
| Occupation | Gas-engine driver |
| Address | 364 Sterling Street, Perth, Western Australia |
| Marital status | Single |
| Age at embarkation | 20 |
| Next of kin | Father, D. Longmuir, 364 Sterling Street, Perth, Western Australia |
| Previous military service | Served in the Military Cadets. |
| Enlistment date | |
| Date of enlistment from Nominal Roll | |
| Rank on enlistment | Private |
| Unit name | 11th Battalion, 18th Reinforcement |
| AWM Embarkation Roll number | 23/28/4 |
| Embarkation details | Unit embarked from Fremantle, Western Australia, on board HMAT A31 Ajana on |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 44th Battalion |
| Other details from Roll of Honour Circular | A typical Australian. |
| Fate | Killed in Action |
| Place of death or wounding | Sailly-le-Sec, Somme Sector, France |
| Age at death | 22.3 |
| Place of burial | Villers-Bretonneux Military Cemetery (Plot XIII, Row C, Grave No. 3), Fouilloy, France |
| Panel number, Roll of Honour, Australian War Memorial | 138 |
| Miscellaneous information from cemetery records | Parents: David and Eunice LONGMUIE, Stirling Street, Perth, Western Australia |
| Family/military connections | Four cousins (returned), one brother (returned) late 16th Bn, one cousin, 4296 Pte William Christopher LONGMUIR, 14th Bn, died of wounds, 12 August 1916. |
| Other details |
War service: Western Front Medals: British War Medal, Victory Medal |