All available race results H. Williamson
| Date | Race | Rank |
| 09/06 | Anfield 100 Invitational | 55 |
| 13/09 | Goulburn - Sydney | 14 |
Rider information for 1930
| Rank | 1042 |
| Score | 2 |
| Name | H. WILLIAMSON |
| Country | Great Britain |
| Team | Individual |
| Date | Race | Rank |
| 09/06 | Anfield 100 Invitational | 55 |
| 13/09 | Goulburn - Sydney | 14 |
| Rank | 1042 |
| Score | 2 |
| Name | H. WILLIAMSON |
| Country | Great Britain |
| Team | Individual |