Tipperary born historian Nicholas Mansergh (1910 - 1991) wrote extensively on the process of decolonisation, the prelude to it, and its aftermath. Well known works include The Irish Question 1840-1921, and The Commonwealth Experience. In 1953, he became Smuts Professor of Commonwealth History in Cambridge, and was Master of St. John's College from 1969 to 1979. He was also editor in chief of the 12 volume record of official documents on India: the Transfer of Power 1942-47.