 About 1465, Courtenay was in exile in France with Queen Margaret of Anjou (wife of King Henry VI of England).He was titular Earl of Devon from 1469.At the readeption of King Henry VI on 9 October 1470, Courtenay was restored to his ancestral lands, which earlier that year had been granted by King Edward IV to John Neville, along with the title of Marquess of Montagu, as compensation for the loss of his earldom of Northumberland.