Denied access to Calais, Warwick and Clarence sought refuge with King Louis XI of France. Louis arranged a reconciliation between Warwick and Margaret of Anjou, and as part of the agreement, Margaret and Henry's son, Edward, Prince of Wales, would marry Warwick's daughter Anne. The objective of the alliance was to restore Henry VI to the throne. Again Warwick staged an uprising in the north, and with the king away, he and Clarence landed at Dartmouth and Plymouth on 13 September 1470 at the head of a Lancastrian army and in October 2 1470, Edward fled to Flanders a part of the Duchy of Burgundy, then ruled by the King's brother-in-law Charles the Bold. King Henry was now restored, with Warwick acting as the true ruler in his capacity as lieutenant. At a parliament in November, Edward was attainted of his lands and titles, and Clarence was awarded the Duchy of York.