The piers are designed as a series of shafts set in square nooks (four on each of the complete sides), with a larger semicircular shaft at each angle. (See Figs. 312 and 314.) The shafts are all built in courses with the piers. They have transition bases and caps. From the latter spring large pointed arches, with plain chamfered orders. The pointed arch indicates the transitional character of this part of the building. It was probably introduced in this position to give strength to sustain the tower. As already mentioned, the three arms of the cross branching to the north, south, and west from the crossing are of equal size. This is a [Illustration: FIG. 318.--Kelso Abbey. Doorway of North Transept.] very unusual arrangement, the western arm or nave being generally much the longest division of the church. We have not heard any satisfactory explanation given of the shortness of the nave of Kelso. This arrangement of plan has apparently been part of the original design, as the western doorway (Figs. 315 and 316) is one of the most prominently Norman portions of the edifice. The upper part of the west front (see Fig. 315), although much broken away, has been in the transition style; while the Norman arcading, which runs round the interior of the nave, was continued across the west end. The nave and the north and south transept each measure about 22 feet in width by 18 feet in length. Each contains four stories in height (Figs. 315 and 317), consisting of an interlacing arcade of Norman work in the interior of the ground level, and three stories of windows above. The upper arcades of the choir do not extend round the nave and transepts, except in a portion of the south transept. (See Fig. 312.) Another arrangement was found desirable in those portions where there were no aisles, as windows could be obtained in that case; while, with aisles (as in the choir), the first floor was darkened by the roof of the [Illustration: FIG. 319.--Kelso Abbey. Plan of Doorway in North Transept.] aisles. The windows in the different stories of the nave and transept have all round arches, both outside (see Fig. 315) and inside, the former having one plain square-edged order supported on nook shafts. Of these the caps and bases only are now for the most part in existence. The exterior is marked at each angle by broad and shallow Norman buttresses, with nook shafts in the angles, and an interlacing arcade running round the lower story, both internally and externally.