Two marriage schemes occurred to him; he might win the hand of Philip's sister Margaret, now Regent of the Netherlands, and with her hand the control of those provinces; or he might marry Juana and claim in her right to administer Castile.

On the acquisition of Castile he set his mind.

If he could not gain (p.

028) it by marriage with Juana, he thought he could do so by marrying her son and heir, the infant Charles, to his daughter Mary.

Whichever means he took to further his design, it would naturally irritate Ferdinand and make him less anxious for the completion of the marriage between Catherine and Prince Henry.