The last three bays of the clearstorey and the last two of the aisle are Decorated work, probably of the end of the thirteenth century, and here the level of the plinth is again lowered to suit the slope of the ground. In the aisle the two bays are separated from the rest and from each other by buttresses having a projection of 8 feet. Either of these buttresses is crowned by a gable having a finial, and is surmounted by a tall square pinnacle to receive the thrust of a flying buttress that spans the aisle; and either pinnacle has its sides panelled and gabled, a head at each corner, and five finials. The two last aisle-windows are larger than those in the western bays, but have much the same tracery. They have, however, a thick shaft worked on the stones of the jamb, and a large keeled round on the edge of the arch, and there is no dripstone. Below them is a small string-course, which is carried round the east end. The string or cornice above them is made to match that on the western portion of the aisle, but in the battlement the merlons are of merely ordinary width. In the clearstorey the wall is considerably set back from the Transitional bays, and the three windows are very elaborate. Their arches are richly moulded and acutely pointed, the springing-line being rather low down. Each window is divided into four lights, comprised under two sub-arches, either of which contains a circle enclosing a trefoil, while above, in the head of the window, is a large circle with five trefoils radiating from its centre. The dripstones end in heads. A moulded string-course, with gargoyles, runs below the parapet, which is a continuation of the plain coping on the western bays. From this point it will be best to return to the west front, and proceed along the south side of the Cathedral.