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 108 THE CHURCHES OF CORNWALL roof, and here they most likely ended, crowned with pyramidal tops. The additional octagonal story of N.W. tower has plain pointed lancets on each face, and is clearly E.E., c. 1250-60, and therefore of like date with rebuilding of quire. The embattled summit is later. The S.W. tower is distinctly Norm, in basement stage, but remainder has been a good deal altered as well as raised at later dates. Arches under towers, opening into church to E. and on each side, are quite plain and supported on bold, clustered columns. Careful examination shows that the Norm, scheme was a nave of 5 bays, for parochial use (exclusive of the W. bay between the two engaged towers), the furthest E. bay being intended for begin- ning of conventual quire when time came for rebuild- ing Saxon chancel. No trace left of any transepts, which were probably left for later development ; and a substantial screen would at that time cut off the parochial nave — necessarily large for the largest parish in Cornwall — from the canon's quire at first piers from E. end of new Norm, structure. The narrow N. aisle (10 ft.) with its round piers and arches was meanly swept away in 1803 t0 save expense of repair, and a cheap new nave wall sub- stituted. On S. side of nave, at W. end, are the two remaining Norm, piers, short, circular, and with escalloped capitals ; but they now support pointed arches. Some singularly fine Norm, clerestory win- dows, of considerable size and richly ornamented with zigzag mouldings, were brought to light in