Original sentence: He was Professor of History at the University of Exeter from 1953 until he retired in 1976 and became Emeritus Professor.. He was a Fellow of both the British Academy and the Royal Society of Literature,  and in 1989 he was awarded the CBE for services to medieval history
Edited sentence: He was Professor of History at the University of Exeter from 1953 until he retired in 1976 and became Emeritus Professor.. He was a Fellow of both the British Academy and the Royal Society of Literature,  and was appointed Commander of the Order of the British Empire in the 1989 Queen's Birthday Honorus "for services to the study of English medieval history"