Elizabeth of York take Richard with him, so the boy could reside in the Tower and keep his brother Edward company. Elizabeth Woodville, under duress, eventually agreed. Two months later, on 22 June 1483, Edward IV's marriage was declared invalid. It was claimed that Edward IV had, at the time of his marriage to Elizabeth Woodville, already been betrothed to Lady Eleanor Butler. Parliament issued a bill, "Titulus Regius" ("The Title of the King"), in support of this position. This measure legally bastardised the children of Edward IV, made them ineligible for the succession, and declared Gloucester the rightful king, with the right
Elizabeth Woodville to the throne with any degree of validity. To strengthen his claim and unite the two feuding noble houses, Elizabeth Woodville and Margaret Beaufort agreed that the latter's son should marry the former's eldest daughter, Elizabeth of York, who upon the death of her brothers became the heiress of the House of York. Henry Tudor agreed to this plan and in December 1483 publicly swore an oath to that effect in the cathedral in Rennes, France. A month earlier, an uprising in his favour, led by Buckingham, had been crushed. Richard III's first Parliament of January 1484 stripped Elizabeth of