On the south side the westernmost Perpendicular bay, up to the triforium, is solid and covered with cinquefoil panelling. In the next two bays the mouldings of the arch, among which a broad hollow is conspicuous, are continued down the column, and there is no capital--a sign of decadence more common in the Flamboyant work of the Continent than here. There is, however, a debased half-capital on the east side of the last Perpendicular column, and on the west side of it are three small heads at the impost-level. These columns are lozenge-shaped in section, wider from north to south than from east to west, and though the mouldings end before they reach the bottom of the column, there is no proper base. Each column has a shaft at the front and another at the back, the former carrying the rim of the arch and having a stilted polygonal base but no capital, while the latter has capital as well as base (both polygonal), and helps to carry the aisle-vault. The spandrels of these arches are filled with panelling, in which are several shields (one bearing the arms of Pigott). The triforium again shows in each bay a round arch; indeed, no better example than this choir could be found of the truth that the form of the arch is not a safe guide to the date of a building, but was often dictated by convenience; for here in the triforium are round arches, of which some belong to the twelfth, others to the thirteenth, and others to the sixteenth century. The fact that the distance between the string-courses was already settled by the Transitional bays, compelled the later builders to make their arches round, as a pointed arch of the requisite width would have been too tall. Here the round arch, which is again flanked by two panels, comprises three cinquefoil lights, and the mullions are carried up through the head. The panels are pointed and divided each into two cinquefoil divisions. The Perpendicular clearstorey windows have their rims moulded, but are not splayed. The vaulting-shafts resemble those in the Decorated bays, but their corbels are polygonal and have the sides slightly hollowed, and the abacus of the capital is a half-lozenge. The string-courses have not been made to match either the Transitional or the Decorated. The whole of this Perpendicular work is of very late character, and justifies the belief that it was the last important alteration in the fabric before the dissolution. Moreover, where it meets the tower there seems to be a 'straight joint,' which indicates that these bays are at any rate later than the tower piers.