 Williamson set out to change this image by admitting men undergraduates and by a comprehensive expansion into new buildings and academic disciplines.She provided a new Students' Union building and revived the religious life of the college by the appointment of four honorary chaplains.By the time she retired as Principal in 1973, the college had admitted men as undergraduates since 1965 and expanded into new buildings, and staff had been recruited for new departments such as biochemistry, statistics, computer science and music.