Complex sentence: Woolley retired in 1937 at the age of seventy-four and after trustees at Mount Holyoke were displeased with her outside activities, a male successor, Roswell Gray Ham was appointed.
Split into simpler sentences: Woolley retired in 1937 at the age of 74. Trustees at Mount Holyoke were displeased with her outside activities, and a male successor, Roswell Gray Ham, was appointed.