 Complete the following phrase:  After the Olympics, Talbot left to become a coach in Canada, forcing Cooper to return to Brisbane to train with Harry Gallagher. In 1973, he was the Australian Champion in the 200 m, 400 m and 800 m freestyle, and the 100 m and 200 m backstroke. However, he continued to switch coaches throughout the year, also training with Allan Wood and Tony Fraser. He went on to compete at the 