| Regimental number | 42136 |
| Place of birth | Australia |
| Occupation | Painter |
| Next of kin | Father, George Beresford Mackay, West Sydney Hotel, Sydney, New South Wales, Australia |
| Rank on embarkation | Private |
| Unit name | New Zealand Expeditionary Force, 23rd Reinforcements, E Company (Unattached) |
| Embarkation details | Unit embarked from Wellington on board HMNZT Corinthic on |
| Sources | Nominal Roll Vol. 3: Roll 57, p. 17 |