
| Regimental number | 3324 |
| Date of birth | |
| Place of birth | Camperdown, New South Wales |
| Religion | Presbyterian |
| Occupation | Electrical fitter |
| Address | Devoncourt, Wharf Road, Concord, New South Wales |
| Marital status | Single |
| Age at embarkation | 21 |
| Next of kin | Father, William Longmuir, Devoncourt, Wharf Road, Concord, New South Wales |
| Enlistment date | |
| Rank on enlistment | Private |
| Unit name | 28th Battalion, 7th Reinforcement |
| AWM Embarkation Roll number | 23/45/2 |
| Embarkation details | Unit embarked from Fremantle, Western Australia, on board HMAT A7 Medic on |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | Australian Army Medical Corps |
| Fate | Returned to Australia |
| Family/military connections | Brothers: 2434 Corporal Ronald Stuart LONGMUIR, 53rd Bn, returned to Australia, 15 May 1919; 5967 Lance Corporal Colin Kenneth LONGMUIR, Australian Army Medical Corps, returned to Australia, 18 October 1917. |
| Other details |
War service: Western Front Medals: British War Medal, Victory Medal There are two entries for William Keith LONGMUIR on the Embarkation Roll: the first cites date and unit of enlistment as 26 August 1915, 20th Bn, 6th Reinforcement. It appears that he did not embark from Sydney on HMAT A14 'Euripdes' on 2 November 1915 with that unit, but transferred to the 28th Bn and embarked in January 1916. |
| Date of death | |
| Age at death | 77 |
| Place of burial | Cremated: Rookwood Crematorium, Sydney, New South Wales; ashes scattered. |