In the windows of the second stage the abacus of the capitals is continued as a string from window to window. The two flanking buttresses have been crowned at some later period with gables ending in finials, and the great gable is pierced with a Perpendicular window of three lights, which has three transoms in the head, the mullions carried up to the archivolt, and a dripstone ending in foliage. The sides of the gable here do not take an upward turn to meet the corners, and there are no flanking turrets. In the end of the aisle the blocked upper window is pointed, and has a little trefoiled niche above and to the left of it, and there is no thickening of the masonry above to necessitate carrying-arches. The buttresses at the corner reach to the top of the parapet and have no surmounting pinnacle. The small portion of the east side of the aisle which is not concealed by the Chapter-house and Lady-loft displays in the lower stage a somewhat inexplicable blind arch, carrying an inclined thickening of the masonry that has been afterwards built up to a level, and below the parapet a moulded cornice like that on the north side of the church. This cornice is continued within the Lady-loft, and reappears over the last bay of the choir-aisle. =The Chapter-House.=--The south aisle of the choir is concealed by a wing of three storeys, of which the lowest, though exposed to view by the conditions of the site, is of the nature of a crypt, while the second comprises the Chapter-house and vestry, and the third, known as the Lady-loft, is an addition, probably of the fourteenth century. The first two storeys seem to have formed part of a church earlier than Archbishop Roger's,[43] and have been variously ascribed to Archbishops Thurstan (1114-1141)[44] and Thomas of Bayeux (1069-1100).[45] From the east wall of these two storeys an apse is thrown out, upon which rests a square projection from the Lady-loft, too short to be called a chancel. The two westernmost buttresses, up to the string above the crypt, are evidently additions by Archbishop Roger, while the third, which completely encases a three-sided apsidal projection at the corner of the vestry, is of much later date and will be examined presently. Adjoining it is a flat pilaster buttress, apparently original. The crypt has five unglazed windows along the south side, all round-headed and plainly splayed, and, where it joins the transept, there is a large rectangular squint which gives light to a staircase that leads up to the Chapter-house. A pointed doorway, made in later times, cuts into the fourth window from the west. In the second storey there are on this side only four windows, which are spaced without any regard to the position of those below. The two westernmost, which are circular and without tracery--a type of window that is somewhat rare--can hardly be later than the time of Archbishop Roger, and may be earlier: the next two are square and of much later date.