Richard had not done much to increase the King's power in Ireland, but he created a Yorkist party there. At the time he was accused of prompting Cade's rebellion, and Jack himself was said to be a native of Ireland. The fact that both Simnel and Warbeck afterwards found their best support among the Anglo-Irish seems to show that the Kildare and Desmond partisans were already familiar with the notion of a Yorkist pretender. It is very probable that the adherents of the White Rose saw their opportunity in the fact that the Earldom of Ulster belonged to their chief, and Cade must have had an object in calling himself Mortimer. All this is plausible conjecture; but about the significance of Richard's second viceroyalty there can be no reasonable doubt. In 1459, after Salisbury's defeat at Blore Heath, the Duke of York was forced to fly, and he took refuge in Ireland, where he seized the government in spite of the Coventry Parliament. The local independence of Ireland was now for the first time seriously attempted. Richard held a Parliament, which acknowledged the English Crown while repudiating the English Legislature and the English Courts of Law. The Duke of York's person was declared inviolable, and rebellion against him was made high treason. The royal privilege of coining money was also given to him. William Overy, a squire of the Earl of Ormonde, who was already acknowledged as head of the Irish Lancastrians, attempted to arrest the Duke as an attainted traitor and rebel; but he was seized, tried before Richard himself, and hanged, drawn, and quartered. After the victory of his friends at Northampton the Duke returned to England. He took with him a considerable body of Anglo-Irish partisans, and he committed the government to the Earl of Kildare. [Sidenote: The Yorkist faction headed by the Earl of Kildare.]