In each bay there are four divisions; the two outer ones blank, and the two others forming the window. The shafts are detached from the wall; the central one is higher than the rest, and its capital is foliated. From the outer columns in the blank divisions, the shoulder, or hipped rib, after rising a short distance, sinks to the level of the capitals of the vaulting columns. At the side of the window columns two small circular mouldings, decorated with small dog-tooth ornament, continue without a break round the head of each window. A large blank quatrefoil is inserted in the space between the lights and the outer arch moulding. [Illustration: NORTH AISLE OF THE CHOIR. From Billings.] The corner column (north side of entrance) has been inserted by cutting away part of the east wall of the north transept. Like the aisle it dates from about the last half of the thirteenth century. On its capital there is the spring of a pointed arch, enriched with dog-tooth ornament similar to the entrance arch. Probably it was intended to pull the north transept down, and rebuild it with the addition of an eastern aisle. This column would then have been part of it. The existence of an offset on the north face of the aisle wall, with the return of the base-course and string-course upon it, seems to add weight to this theory. The nearest clustered column to it has also been altered, and consists of five shafts instead of three. A rib springs from the additional shafts to the centre of the corner column. There are also remains of groining like that of the aisle. The bay near the entrance has a window (Perpendicular) dating from after the Civil Wars. Beneath this there was formerly an entrance to the cathedral. This has now been walled up. The groined stone roof dates from after 1292, although, perhaps, it is composed of materials of an earlier date. On the south side of the entrance is a very beautiful foliated bracket; the foliated boss at its base was at one time ornamented with a very fine knot. #Monuments in North Choir Aisles.#--In the third bay from the east are two low-arched recesses. Being of the same date as the aisle, they may have been intended to receive the statues of the bishops who did their best to repair the ravages of the fire in 1292. The arches are almost flat, and decorated with a kind of chevron moulding very rarely met with. In Burpham Church, Sussex, there is another example of this moulding applied to the decoration of the south side of the south transept arch.