III. LATE NORMAN.—The works on the church were now probably suspended for a considerable time, while the monks, as at Gloucester, replaced the temporary buildings of the monastery by permanent ones. These temporary wooden buildings seem to have been situated in the usual position—viz., south of the nave. It was probably not to interfere with these that the permanent monastic buildings were placed in an abnormal position, south of the choir. Much of this work was done by Bishop Ernulph (1115-1124), who had been a great builder at Canterbury, while prior, and at Peterborough, as abbot. Parts of the cloister, refectory, and chapter-house remain. [Illustration: NAVE, NORTH SIDE.] When at length the builders returned to the nave of the cathedral (_c._ 1120), fashions had changed. Gundulph’s eleventh-century design and his rough tufa masonry seemed archaic and barbaric. His tufa was therefore cased with good Caen stone, as was done later in the century at Chichester; his piers and capitals were remodelled, and on the side of the nave the outer square order of the pier-arch was covered with zigzag ornament. The aisles, as at Hereford, where a precisely similar transformation of eleventh-into twelfth-century work was taking place at the same time, were left unaltered. Gundulph had placed pilasters along the inner face of the aisle-walls, evidently intending that the aisles should be vaulted; but his successors apparently thought the walls too thin, as at Carlisle, to support a vault; so, instead of vaulting the aisles and obtaining thus a continuous passage the whole length of the church, they constructed a passage in the thickness of the wall of the triforium. Thus Rochester, like Vignory, has the distinction of possessing a sham triforium. Waltham Abbey also has a triforium arcade, but no triforium floor; but that is because the vaults which originally covered the aisles had subsequently to be taken down. Still later—about the middle of the twelfth century—is the west front, with its magnificent doorway, and the diaper of the triforium.