The angle between the choir aisle and south transept is filled up with the vestry and the library above it. The south wall of this projects beyond the wall of the south transept. This vestry is of Decorated date, possibly rather later than the other Decorated work in the minster. The upper storey forms the library. Its walls are finished at the top by a plain parapet which conceals the flat roof. At the south-western angle is an octagonal turret staircase, capped by a pyramidal roof rising from within a battlemented parapet, and terminating in a carved finial. This is of Perpendicular character. From the sharpness of the stone at the coigns it would seem that very extensive restoration, if not absolute rebuilding, of the walls was carried on in this part of the church. The south transept is rather shorter than that on the north side; but, unlike it, all the walls up to the level of the window are of Norman date. The string courses on the western side are worthy of close attention. One which runs under the south window is continued round the Perpendicular buttresses at the south-west angle, and then again joins the original course on the western face and runs to within a few feet of the nave aisle, where it abruptly terminates. Above this for several feet the walls have the same character as below; then the character changes, and this change probably marks the junction of the Norman with the Decorated work, which was added when the Norman chapel, which occupied the lower part of what is now the south end of the transept, was incorporated in the transept. Vertically above the termination of the string course just mentioned, but at a considerably higher level, another string course abruptly begins and runs along the wall, until it passes within the roof of the nave aisle. The south end of this shows the length to which the original Norman transept extended before the walls of the chapel to the south were carried up in the fourteenth century to form the addition to the transept. In the southern wall of this new transept was placed a large five-light decorated window. In this, as in several of the other Decorated windows already described, the lights run up to the enclosing arch above. The tracery of this window, as it now exists, dates back only to the time when the church was restored in the middle of the nineteenth century. Up to 1891 the side walls were about two feet lower than at present, and the gable more obtuse. At the summit of the old gable stood a block of masonry carrying a sundial; this, when the transept was altered, was removed, the new gable being finished with a cross. A pillar was built in the churchyard to the south of the western tower in 1894, and on it the block from the transept bearing the sundial was placed. This sundial has two dates on it--1696 and 1752, marking, no doubt, the year of its original erection and of some subsequent repair. It is noteworthy that the figures used in