| Regimental number | 550 |
| Religion | Congregational |
| Occupation | Bank manager |
| Address | 2 Allen Street, Pyrmont, New South Wales |
| Marital status | Single |
| Age at embarkation | 29 |
| Next of kin | Father, Rev James Buchan, 2 Allen Street, Pyrmont, New South Wales |
| Enlistment date | |
| Date of enlistment from Nominal Roll | |
| Rank on enlistment | Private |
| Unit name | Machine Gun Company 6, Reinforcement 9 |
| AWM Embarkation Roll number | 24/11/3 |
| Embarkation details | Unit embarked from Melbourne, Victoria, on board HMAT A67 Orsova on |
| Rank from Nominal Roll | Corporal |
| Unit from Nominal Roll | 3rd Machine Gun Battalion |
| Fate | Returned to Australia |
| Family/military connections | Brothers: Captain William BUCHAN MC, 1st Bn, returned to Australia, 28 February 1919; 240 Segeant George Rutherford BUCHAN, 13th Bn, killed in action, 11 April 1917. |
| Other details |
War service: Western Front Medals: British War Medal, Victory Medal |