The north transept, rebuilt by Aquablanca in the Decorated period, and restored by Scott, is remarkable for the diapering of the triforium arcade, and for the form of the pointed arches and windows, which have so slight a curvature as to resemble two straight lines meeting at an angle. The north window is filled with stained glass by Hardman as a memorial of Archdeacon Lane-Freer, who died in 1863. In this transept is the tomb or substructure of the shrine of Thomas de Cantilupe, early Decorated work which has been restored. Of Purbeck marble, it is built in two stages, of which the lower contains 14 figures of Knights Templars in chainmail armour, occupying cinquefoiled niches; the Bishop was Provincial Grand Master of that Order in England. Between the north choir aisle and the eastern aisle of the transept is the tomb of Peter Aquablanca, the most ancient of the episcopal monuments in the church. The effigy is an example of a bishop in full vestments; the canopy is supported by slender shafts; the carving throughout is delicate. The south transept is thought by some authorities to be the oldest part of the cathedral, and it exhibits some Norman work, notably the eastern wall with its arcades.