While rumors as to Warwick's new-born sympathies with the house of Lancaster were afloat, the Castle of Harleck fell into the king's hands. Within the fortress was taken an agent of Margaret; and he, on being put to the rack, declared that Warwick, during his mission to France, had, at Rouen, spoken with favor of the exiled queen, during a confidential conversation with Louis. Warwick treated the accusation with contempt, and declined to leave his castle to be confronted with the accuser. This unfortunate incident was little calculated to smooth the way for a reconciliation. Nevertheless, the Archbishop of York, who had a keen eye for his own interest, undertook to mediate between his brother and the king. The churchman was successful in his efforts; and in July, 1468, when Margaret Plantagenet departed from England for her new home, Warwick rode before her, through the city of London, as if to indicate by his presence that he had withdrawn his objections to her marriage with the Count of Charolois, who, in the previous year, on the death of his father, had succeeded to the ducal sovereignty of Burgundy. The chroniclers might with propriety have described this as a second "dissimulated love-day." No true reconcilement could take place between the king and the king-maker. Warwick considered Edward the most ungrateful of mankind; and the king thought of the earl, as the Regent-Duke of Albany said of the third Lord Home, that "he was too great to be a subject." The king regarded Warwick's patriotic counsel with aversion: the earl's discontent could be read by the multitude in his frank face. Each, naturally, began to calculate his strength. Edward had one source of consolation. In giving his sister to Burgundy he had gained a potent ally on the Continent; and he rejoiced to think that, in the event of a change of fortune, a relative so near would assuredly befriend him. Edward, like other men, deceived himself on such subjects. He little imagined how soon he would have to ask his brother-in-law's protection, and how he should find that Burgundy, while taking a wife from the house of York, had not quite laid his prejudices in favor of the house of Lancaster.