Complex sentence: Morrisson was on the Connecticut College Board of Trustees from 1937 and the Secretary of the board from 1938 to 1965, she also was on the state board of Connecticut at different times then went on to Board of Groton and New London Leagues.
Split into simpler sentences: Morrisson was on the Connecticut College Board of Trustees from 1937 and the Secretary of the Board from 1938 to 1965. She also was on the state board of Connecticut at different times and then went onto the Board of Groton and New London Leagues.