 Complete the following phrase:  Thorburn reached the final of the 1978 Masters with wins over Doug Mountjoy and Spencer, losing 57 to Higgins in the final. He was knocked out of the 1978 World Snooker Championship by Charlton, 1213 in the quarter-finals. In the 197879 snooker season he defeated Tony Meo 1715 in the final to win the 1978 Canadian Open after having trailed 610 at the end of the first day of the final, but lost his opening matches in both the Masters 45 to Perrie Mans and the 