In a very short time, however, Margaret had another rival, at least for the purposes of diplomacy. This was Joanna of Castile, Philip's widow, whom Henry had seen in the spring of 1506. That her sanity was already very much in question seems to have made very little difference. Throughout the greater part of 1507 and 1508 the English King was making overtures to Margaret herself, and for Joanna to Ferdinand, blowing hot and cold in the matter of his son Henry and Katharine, and pushing on the betrothal of his younger daughter Mary with the boy Charles--a proposal brought forward, when the latter was but four months old, in 1500, but not at that time sedulously pressed. In part, at least, the explanation of all this diplomatic play lies in Henry's relations with Ferdinand. The King of Aragon, having lost his wife Isabella, wished to retain control of Castile; at the same time he was in difficulties about paying up the balance of Katharine's dowry, without which Henry would not allow her marriage with his son to go forward, while the luckless princess was kept scandalously short of supplies. Henry certainly wished to put all the pressure possible on Ferdinand to get the dowry; perhaps he seriously contemplated marriage with Joanna as a means of himself depriving Ferdinand of control in Castile; the marriage of Charles to his daughter Mary would have a similar advantage. On the other hand, if he married Margaret of Savoy he would get control of the Netherlands, and still grasp at the control of Castile through Charles, while playing off the boy's two grandfathers, Maximilian and Ferdinand, against each other. Henry was in fact paying Ferdinand back in his own coin; but the picture is an unedifying one, of craft against craft, working by sordid methods for ends which had very little to do with patriotism and no connexion with justice. [Sidenote: 1508 The League of Cambrai] If, however, it was now Henry's primary object to isolate Ferdinand so that he could impose his own terms on him, the object was not attained. Maximilian had just taken up a new idea--the dismemberment of Venice; an object which appealed both to Lewis of France and to Pope Julius. Ferdinand could generally reckon that if he joined a league he would manage to get more than his share of the spoils for less than his share of the work. The League of Cambrai--a simple combination for robbery without excuse--was formed at the end of 1508. Henry was left out, for which, indeed, he cared little, knowing that the process of spoliation would inevitably result in quarrels among the leaguers. But though he advanced the arrangements for the marriage of Charles and Mary so far as to have a proxy ceremony performed, the marriage project with Joanna was withdrawn, and his overtures were also finally declined by Margaret of Savoy. [Sidenote: Wolsey]