As such he may have stayed in France for some time , since the duke was Regent of France from 1423 to 1429 , and then Governor of Normandy from 1429 to his death in 1435 .
He may have spent some time in France because the duke was Regent of France from 1423 to 1429 , and then Governor of Normandy from 1429 to his death in 1435 .