[1] He also inherited the title of Constable of the Scottish Army in France, and the chieftaincy of the Stewarts of Darnley.
By 1437, he had resigned his French territories to his younger brother, Sir John Stewart and returned to Scotland.
He became involved in a blood feud with the Boyd family of Dean Castle.
Darnley was killed in 1439 by Sir Thomas Boyd of Kilmarnock, his death was avenged later that summer by his youngest brother Alexander Stewart at the Battle of Craignaught Hill.
Balfour Paul, Sir James, Scots Peerage, IX vols.