=The South Choir Aisle.=--This aisle, in some respects, has been altered more than the other, but the south wall is Archbishop Roger's work as far as the end of the fourth bay, if not farther. About 14 feet from the west end occurs that 'straight joint' in the masonry which shows the separation of this aisle from the Mallory Chapel to have been an afterthought; and a little further east a round-headed doorway, moulded with the edge-roll and retaining a panelled door of some age, opens into the Chapter-house. There was evidently a second and similar doorway a few yards further on, but it has been blocked (doubtless when the cross-wall was built at the back of it between the Chapter-house and vestry), and a square-headed doorway has been made to open into the latter. To the right of this entrance is a square-headed lavatory with a projecting rectangular basin and a hole knocked through into the lobby behind. This lavatory is of course an insertion, probably of the fifteenth century; indeed the whole of this part of the wall has been much repaired with limestone. The aisle is somewhat darkened by the fact that its first four windows look into the Lady-loft. Fortunately the three westernmost are original. They are as usual round-headed and plainly splayed, and their sills descend to the string-course in steps. Archbishop Roger's vaulting-shafts here are in better preservation than in the other aisle. The original vaulting itself must of course have been taken down when the three westernmost columns of the choir-arcade were rebuilt, but in the reconstruction the old ribs seem to have been used again. The groin-ribs have no room to descend upon the Perpendicular choir-capitals, and end prematurely upon corbels carved into faces.