Background
He was born in Carneddi, Bethesda, Caernarfonshire, Wales, and read Latin and Welsh at the University College of North Wales, Bangor.
He was born in Carneddi, Bethesda, Caernarfonshire, Wales, and read Latin and Welsh at the University College of North Wales, Bangor.
He was appointed Head of the Department of Celtic at the University of Liverpool in 1936. His academic career was interrupted by World World War II, when he worked in Naval Intelligence, contributing to the Geographical Handbook Series. He was appointed as the third holder of the Oxford chair in Celtic (originally held by Sir John Rhys) in 1947 and became a Fellow of Jesus College, Oxford at the same time.
He was knighted in 1977 and retired the following year back to his birthplace, where he died in 1984.
His most important work in the field of Celtic Studies were in Medieval Welsh and Irish, both poetry and prose. He made a particular contribution to the study of tale of Culhwch ac Olwen, and his edition of the tale was published in 1992, after his death.
The National Library of Wales holds the archive of his papers.