| Place of birth | Auckland, New Zealand |
| Religion | Baptist |
| Occupation | Civil engineer |
| Address | Sydney, New South Wales |
| Marital status | Widower |
| Age at embarkation | 33 |
| Next of kin | Father, Robert Barbour Mckay, 'Woodstock', Conon Street, Invercargill, New England |
| Enlistment date | |
| Place of enlistment | Sydney, New South Wales |
| Rank on enlistment | 2nd Lieutenant |
| Unit name | April 1917 Reinforcements |
| AWM Embarkation Roll number | 14/42/3 |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board HMAT A28 Miltiades on |
| Rank from Nominal Roll | Lieutenant |
| Unit from Nominal Roll | 4th Division Engineers |
| Fate | Returned to Australia |
Postal Address:
Po Box 7916
Canberra BC 2610, Australia
Street Address:
Northcott Drive,
Campbell, ACT 2600
