| Regimental number | 71020 |
| Occupation | Labourer |
| Next of kin | Father, William Robert Mercer, Tapanui, Otago |
| Rank on embarkation | Private |
| Unit name | New Zealand Expeditionary Force, 35th Reinforcements, B Company |
| Embarkation details | Unit embarked from Wellington on board HMNZT 101 Tofua on |
| Sources | Nominal Rolls Vol. 4: Roll 80, p. 8 |