In February 1472, King Ferdinand received Frederick with the aim to aid in the project, a Burgundian delegation insisted that Charles the Bold, for its part, had not stopped his choice. Frederick's sister Eleanor expressed confidence in the idea that the Duke of Burgundy sought to join in alliance before Easter. But these hopes were shattered during the summer when they learned, at the court of Naples, of the engagement of Mary of Naples to Nicholas of Lorraine, a claimant to the Kingdoms of Naples and Aragon, resulting from the alliance concluded between the dukes of Burgundy and Lorraine, and Charles the Bold initialled by Arras on May 25, 1472, and signed by Nicholas, in turn, on May 27, 1472. Mary gave her consent to the promise of marriage on June 13, 1472 and Nicolas sent her his "Mons-en-Hainaut" the same day.