In 1248 an earthquake did some damage to the central tower, and repairs were at once undertaken. The canons generously contributed funds which were augmented by the help of a local saint. Bishop William Bytton, nephew of the bishop of the same name (who lies in St. Catherine’s Chapel), died in 1274; and his remains soon began to cure the toothache. His tomb in the south-choir-aisle was visited by sufferers, and the famous western capitals in the transept doubtless refer to their cures. For the next fifty years and more, much was done to the Cathedral by the energetic John de Godelee, dean from 1306 to 1333, who finished the Lady Chapel in 1326. In 1318 the canons voluntarily offered a fifth of their salaries to raise the central tower, which was carried up three more stages and finished in 1321; and in 1325 they began new stalls, each canon having agreed to pay for his own stall. In 1337 and 1338 the whole church was thrown into dismay on account of fractures in the tower; for the tower appears to have sunk deeply into the earth, owing to pressure on the arches. All the masonry was disturbed; and in order to remedy this trouble, the curious double arches were inserted, to help support the strain. The original arches were also patched up and filled in with great blocks of stone and strengthened in various ways. Much was due to Bishop Ralph of Shrewsbury (1329-1363), who was buried before the High Altar in the Choir he had founded. He also finished the Palace begun by Jocelin. Bishop Harewell, who died in 1386, gave two-thirds of the cost of the south-west tower called by his name; and the executors of Bishop Bubwith finished the northwest tower that bears his name. Bishop Beckington built the lovely gateways, and Dean Gunthorpe (died 1498), the Deanery. The eastern walk of the Cloister and the Library above date from between 1407 and 1424; and the western and southern Cloister walks, between 1443 and 1464.