Instead of agreeing that Hugh of Rarichies would succeed William, the king settled the earldom on William's daughter, Euphemia, and then forced her to marry Walter de Leslie, who had made a name for himself fighting with the king of France, with the Holy Roman Emperors in the Northern Crusades, and with Peter of Cyprus on his Alexandrian Crusade. David II wished to reward this internationally renowned Scotsman for his bravery by settling an earldom on him. To this end, at Perth on 23 October 1370, David took the step of re-confirming William in the earldom of Ross and lordship of Skye, but only with the unwelcome stipulation that he must give his daughter in marriage to Leslie. Though Ross planned to seek help through the chancellor, he was stopped by the forces of Walter Leslie, who waylaid and attacked his emissaries. In 1371, after King David died, William appealed to Robert II, whom he had fought with at the Siege of Perth when Robert was High Steward of Scotland, but to no avail.