Complex sentence: Hare was dean of arts and science at McGill starting 1962 before returning to England in 1964, where he was Master of Birkbeck College from 1966 to 1968, during which he served as president of the Royal Meteorological Society.
Split into simpler sentences: Hare was Dean of Arts and Science at McGill starting 1962 before returning to England in 1964. He was Master of Birkbeck College from 1966 to 1968, during which he served as president of the Royal Meteorological Society.