Population growth and economic development since 1750, 1971 (20-10-2015)

He was educated at Barry County School and St John's College, Cambridge (scholar and Strathcona Student, starred first class degree in History 1936). (He was not, as sometimes erroneously stated, connected with Jesus College, Cambridge). He began to study for a PhD under John Clapham, but his progress was interrupted by the Second World War. In 1938, he was elected a Fellow of Pembroke College, Cambridge, a position he held until 1950. He worked in the Foreign Office 1939–42 and the Board of Trade 1942–46, during which period he still found time to carry out research at the Public Record Office and in the archives of country houses.