All available race results J.C. Mercer
| Date | Race | Rank |
| 25/11 | 10 Miles Championship of Wales | 1 |
| 29/11 | 20 Miles Championship of Wales | 1 |
| 22/12 | Six Days Hull | 5 |
Rider information for 1879
| Rank | 31 |
| Score | 96 |
| Name | J.C. MERCER |
| Country | Great Britain |
| Team | Individual |