Then followed various intrigues, manoeuvres, and arrangements, which we have not time here fully to unravel; but the end of all was, that in a few weeks after the Earl of Warwick's landing in France, he repaired to a castle where Margaret of Anjou and her son, the Prince of Wales, were residing, and there, in the course of a short time, he made arrangements to espouse her cause, and assist in restoring her husband to the English throne, on condition that her son, the Prince of Wales, should marry his second daughter Anne. It is said that Queen Margaret for a long time refused to consent to this arrangement. She was extremely unwilling that her son, the heir to the English crown, should take for a wife the daughter of the hated enemy to whom the downfall of her family, and all the terrible calamities which had befallen them, had been mainly owing. She was, however, at length induced to yield. Her ambition gained the victory over her hate, and she consented to the alliance on a solemn oath being taken by Warwick that thenceforth he would be on her side, and do all in his power to restore her family to the throne. This arrangement was accordingly carried into effect, and thus the earl had one of his daughters married to the next heir to the English crown in the line of York, and the other to the next heir in the line of Lancaster. He had now only to choose to which dynasty he would secure the throne. Of course, the oath which he had taken, like other political oaths taken in those days, was only to be kept so long as he should deem it for his interest to keep it. He could not at once openly declare in favor of King Henry, for fear of alienating Clarence from him. But Clarence was soon drawn away. King Edward, when he heard of the marriage of Warwick's daughter with the Prince of Wales, immediately formed a plan for sending a messenger to negotiate with Clarence. He could not do this openly, for he knew very well that Warwick would not allow any avowed messenger from Edward to land; so he sent a lady. The lady was a particular friend of Isabella, Clarence's wife. She traveled privately by the way of Calais. On the way she said nothing about the object of her journey, but gave out simply that she was going to join her mistress, the Princess Isabella. On her arrival she managed the affair with great discretion. She easily obtained private interviews with Clarence, and represented to him that Warwick, now that his daughter was married to the heir on the Lancastrian side, would undoubtedly lay all his plans forthwith for putting that family on the throne, and that thus Clarence would lose all. "And therefore," said she, "how much better it will be for you to leave him and return to your brother Edward, who is ready to forgive and forget all the past, and receive you again as his friend."