The parapet to the aisle chapels in the four western bays is plain, with a weathered coping and string-course in which is some carved work of late fourteenth-century date. The gables between the buttresses are gone, as is the case on the south side; but traces of their old copings remain. The four large three-light windows are the same in design and detail, and were no doubt executed when the chapels themselves were built. They have traceried heads with early types of cusping of about the same date as, or a little later than, the rose window in the east gable; but they are certainly thirty or forty years earlier than those of the lady-chapel. The north window of the chapel in the fifth bay is a modern insertion of the same character as in the south aisle chapels of the nave. It probably, like them, contained a fifteenth-century window, which was removed to satisfy the taste which thought the present substitute the better thing. The detail of the two orders of its outer arch is earlier than that of the windows west of it. Above the point of this window is a small circular one, with a cusped treatment of perhaps the same date as the ones in the east end of the chapels at the end of the aisles of the presbytery. The #North Porch# has a pointed outer arch in two orders. The abaci to the capitals are square; but now there are no shafts or bases in the jambs. The sub-arches appear to be about the same date as the transept vaulting, as they have the dogtooth ornament in their mouldings. On the west face of the buttress, close by, is a double niche in very bad repair; but as a specimen of work it is well worth studying. The parvise chamber above this porch is not lighted except by the small cuttings in the form of a cross which pierce the wall. The new north-west tower, or its north front, has imitations of twelfth-century work throughout, except in the case of the coupled openings in the top stage, which are like the thirteenth-century work at the same level in the south-west tower. The lower part of the north-east buttress incorporates the remains of the original twelfth-century flat buttressing. The #Central Tower# and #Spire#, although they were rebuilt again after the disaster in 1861, are as nearly as possible an exact reproduction of the originals.