Her young son Henry was a favourite of Henry VI., who bestowed most unusual favours upon him, creating him Duke of Warwick and King of the Isle of Wight, and later King of Jersey and Guernsey. The young Duke, who was married to Cicely Neville, died at the age of twenty-one, and was buried in the choir of the Abbey. As he left no children, the manor passed in 1449 to his sister Anne, the wife of Richard Neville the "King-maker." All the "King-maker's" estates were confiscated to the Crown after he fell at Barnet in 1471, but were eventually shared between his two daughters Isabelle and Anne. Isabelle married George, Duke of Clarence, Earl of Warwick and Salisbury, who in 1477, a few days after Isabelle's supposed death by poison at Warwick, was put to death in the Tower. Both were buried at Tewkesbury (_vide_ p. 62). The young Edward, son of the Duke of Clarence, was imprisoned in the Tower till his execution in 1499. The Manor of Tewkesbury, as a possession of the Warwicks, passed into the hands of Lord Seymour of Sudeley, the husband of Catharine Parr, until his attainder, when they once more came into the hands of the Crown. James I. sold the manor to the Corporation in 1609. During the present century the lordship of the manor again passed by sale into private hands. In the chronicles of the Abbey the following facts are recorded:-- In 1218 the dormitory roof fell down upon the monks when they returned from an early service, and Gilbert, a monk, had a thigh broken and his head injured, while the Prior Gunfrey escaped unhurt. In 1224, Robert Travers, Bishop of Kildelo (_i.e._ Killaloe), in the winter dedicated two large bells in the tower. In 1234 the principal gate of the monastery and two stables were burnt down. In 1237, Hervey de Sipton, the then Prior, pulled down and rebuilt the chapel dedicated to St. Nicholas. Nothing can be said definitely as to its size, owing to the later work done in this part. The chronicle, however, distinctly states that divine service was first held in Prior Sipton's new chapel dedicated to St. Nicholas, on St. Nicholas' Day.[2] The roof bears the arms of the Clares and Despensers, and this would give the date of the bosses as 1321-1337, _i.e._, about a century later than the date of the chapel. The two chapels which are now usually known as those of St. James and St. Nicholas were, at one time, supposed, without authority, to have been the chapter-house of the monastery. They were so described as recently as 1881, in the plan used by the members of the Architectural Association for their excursion to Tewkesbury. For many years they were in use as a grammar school, and were walled off from the rest of the church. In 1239 a grand altar was dedicated to the honour of the Virgin, "gloriosæ Virginis Mariæ." This is by some supposed to refer to the present altar-stone of Purbeck marble.