| Regimental number | 23/218 |
| Address | Westport |
| Marital status | Single |
| Next of kin | Father, George Gunn Mackay, 11 Rintoul Street, Westport |
| Rank on embarkation | Private |
| Enlistment status | Volunteer |
| Unit name | New Zealand Expeditionary Force, 1st New Zealand Rifle Brigade, Advance Party, A Company |
| Embarkation details | Unit embarked from Wellington on board HMNZT 29 Waitemata on |
| Miscellaneous details | Nominal Roll Vol. 1: A Company/Adv Party of 1st NZRB |