Alexander Nevill, his immediate successor, probably did not do much to remedy this, for he soon became involved in Richard II.'s rash proceedings, and had to fly to Louvain, where he died in poverty. Neither did Arundel or Waldby, his successors, for the former was soon translated to Canterbury, the latter soon died. But Richard Scrope, who was appointed in his place, would naturally be earnest and vigorous in the good work, for he was a Yorkshireman by birth, son of Lord Scrope of Masham, kinsman of Lord Scrope of Bolton, and, during the short nine years which elapsed between his installation and his wanton, cruel murder by Henry IV., the building seems to have made rapid progress. This was energetically continued by Henry Bowet, who followed him, and who, invoking the aid of Pope Gregory XII. to enforce his appeal for funds, and enlisting the aid of Skirlaw, Bishop of Durham, one of the greatest architects of mediæval times, glazed the great East window with its elaborate glass executed by John Thornton of Coventry, 1409, raised the lantern on the central tower, completed the groining of the choir aisles, rebuilt Archbishop Zouche's chapel, the treasury and vestry, and commenced the library. He was indeed a man of action to the end, for when incapacitated for walking or riding by age and infirmity, he was carried in his chair, arrayed in a breastplate with three buckles, five pendants, and ten bars of silver gilt, at the head of the forces raised by the wardens of the North of England, and through the influence of his presence, encouraged the soldiers to rout the Scotch who had invaded Northumberland and besieged Berwick, 1417. [Illustration: The Lady Chapel] Little now remained to be done. Robert Wolvedon and John de Bermyngham, two munificent treasurers in succession, helped to bring matters to a prosperous conclusion, the former filling some of the windows with painted glass, the latter raising the south-western tower. The north-western tower was added probably during the archiepiscopate, if not by the munificence, of Archbishop George Nevill. The organ screen, with its elaborate cornice and canopies enriched with angels singing and playing instruments of music, and its stately niches filled with figures of the Kings of England, from William I. to Henry VI., was built by Dean Andrew, himself the friend and secretary of the last-named monarch. And the great church was solemnly reconsecrated as a completed building on July 3rd, 1472, when an ordinance was passed by the Dean and Chapter that "on the same day the feast of the Dedication shall be celebrated in time to come." [Illustration: Perpendicular Piscina]