Chapter VI: PERPENDICULAR.—The great gateway was built c. 1380. The nave and

choir were better lighted on the north side by the insertion of windows in the triforium. The watching-loft was constructed _c._ 1420; the choir was ceiled, and the great reredos was erected _c._ 1480. To the same period belong the brass of Abbot de la Mare, _c._ 1390; and the grand chantries of Abbot Wheathampstead and Duke Humphrey of Gloucester, _c._ 1440.