Complex sentence: He served as Secretary to the Society 1923-28, Vice-President 1928-31, President 1944-49 and won the Society's Makdougall-Brisbane Prize for 1940-42.
Split into simpler sentences: He served as Secretary to the Society 1923-28, Vice-President 1928-31 and President 1944-49. He won the Society's Makdougall-Brisbane Prize for 1940-42.