12 May, while Edward IV was still on his way to London, the last supporters of the Lancasters organised an attack on the Tower, intending to restore Henry VI to the throne; two towers, one of which Cecily and her family were sheltering in, were fired on from the river. The attack was repulsed, but after this the king decided to put his predecessor to death, and on 21 May 1471, King Henry VI was strangled in his dungeon. The death of Henry VI returned Cecily to the position of the daughter of a legitimate and recognised monarch. Princess of Scotland In 1474, the first marriage plans for Cecily began to appear: Edward IV negotiated the marriage of his daughter to the heir to the Scottish throne, James, Duke of Rothesay. The formal betrothal took place on 26 October or 26 December 1474 in Edinburgh between the proxies of the bride and groom: the Earl of Crawford and Baron Scrope, respectively. As a widow's share in the event of the death of James during the life of his father, Cecily received all the possessions that the prince himself used, including the Duchy of Rothesay, the County of Carrick and lands that were part of the personal possessions of the House of Stuart. In the event that the prince became King of Scotland or if his mother died during her husband's lifetime, Cecily would receive a third of all lands, possessions and taxes assigned to the queen, or their equivalent. In the event of the premature death of Cecily or James, the hypothetical second son of King James III (at the time of the betrothal, Rothesay was the only child of the king) had to marry any other daughter of Edward IV, if she was not older or younger than the prince by more than three or four years. As a dowry, Cecily received 20,000 marks from her father. These funds were to be paid in instalments: 2,000 marks within three months after the conclusion of the contract, 2,000 more within two years after that, and the rest of the amount was to be paid at a 1,000 marks per year until full payment. Edward IV and James III were to meet at Berwick in the summer of 1475 to hand over the first part of Cecily's dowry. Apparently, the meeting took place, since on 20 June 1475 Edward IV signed