Hallward was a pupil at Haileybury College, an undergraduate at King's College, Cambridge and a Classics don at Peterhouse, Cambridge prior to becoming headmaster of Clifton. During the war he was forced to take the school into wartime exile in Bude, North Cornwall, where it nevertheless flourished under his leadership and came top of the national academic league tables. In 1948 he became the first Vice-Chancellor of the University of Nottingham and in his seventeen years there he created a great university on a large campus, building many halls of residence on the collegiate principle as well as academic and administrative departments. He was also an outstanding judge of academic and teaching ability and he appointed many distinguished staff. In 1965 he retired and spent much of the next ten years with his wife on board their ocean-going yacht 'Delphis' in the Mediterranean. He lived to be 102 and was still a major force as a character and an intellect well into his late nineties.