He served in World War I, with the Red Cross in France, and in Belgium with the YMCA/B.E.F. Chambers became Quain Professor of English at UCL in 1922.
He was a cousin of Jones Quain (1796–1865), the author of Quain's Elements of Anatomy and of Richard Quain, who was president of the Royal College of Surgeons in 1868, and left to University College, London, funds with which the Quain Professorships of botany, English language and literature, law, and physics were endowed.
He was the son of James Edward Geoffrey de Montmorency, Quain Professor of Comparative Law at the University of London.
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