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 the love and favour of the communal tie (which outwardlie glosed, and openly dissembled with him) ... gave prodigally so many and so great rewards, that now both he lacked, and scarce with honesty how to borrow." Richard also failed to open any investigation into the matter, which would have been in his interest if he was not responsible for the deaths of his nephews. Richard was away from court on a progression through the Yorkist heartlands at the time the princes disappeared; if they died at this time, he would have been unable to murder them in person. They