Princes in the Tower act stated that Edward IV and Elizabeth Woodville's marriage was invalid because of Edward's pre-contract of marriage with Lady Eleanor Butler. Gloucester was crowned King Richard III of England on 3 July. The declaration of the boys' illegitimacy has been described by Rosemary Horrox as an ex post facto justification for Richard's accession. Dominic Mancini, an Italian friar who visited England in the 1480s and who was in London in the spring and summer of 1483, recorded that after Richard III seized the throne, Edward and his younger brother Richard were taken into the "inner apartments of the Tower" and
Princes in the Tower Portuguese document suggests Buckingham as the guilty party, stating "...and after the passing away of king Edward in the year of 83, another one of his brothers, the Duke of Gloucester, had in his power the Prince of Wales and the Duke of York, the young sons of the said king his brother, and turned them to the Duke of Buckingham, under whose custody the said Princes were starved to death." A document dated some decades after the disappearance was found within the archives of the College of Arms in London in 1980; this stated that the murder "be the