 In 1462, the last and most ambitious of the Lords, John MacDonald II, struck an alliance with Edward IV of England under terms of the Treaty of Ardtornish-Westminster with the goal of conquering Scotland.The onset of the Wars of the Roses prevented the treaty from being discovered by Scottish agents, and Edward from fulfilling his obligations as an ally.A decade later, in 1475, it had come to the attention of the Scottish court, but calls for forfeiture of the Lordship were calmed when John quitclaimed his mainland territories, and Skye.