[6] This was the original Benedictine arrangement, which is said to remain in this church and Westminster Abbey only. The pulpit against the fourth pier on the north side, counting from the rood screen, is new, decorated with pentagonal diaper work--pentagons being apparently particularly attractive to Lord Grimthorpe. #The Organ.#--The present organ when first built in 1862 was placed in the north arm of the transept, where the previously used organ had stood; in 1877 it was moved to the north-east corner of the nave; and was again moved in 1882, being then placed where it now is. In 1885 it was enlarged by Lord Grimthorpe, and the key-board was placed at the south end, so that the organist might command a view of the choristers, whether they were singing in the nave or in the choir. It is considered a fine and powerful instrument, and no better position in the church could be found for it. [Illustration: SOUTH AISLE OF NAVE FROM EAST.] #The South Aisle.#--At the western end of the south wall of this aisle may be seen the remains of an arch which was intended to lead into the south-west tower. Above it, high up, is a single-light window. The next three windows, of two lights each, with Decorated tracery, were inserted by Lord Grimthorpe in the blank wall; the next window probably dates from the seventeenth century. The windows in the next five bays come down on the inside to a much lower level than those to the west (see illustration, p. 43), but the bottom of the glass was kept high so as to be above the roof of the north walk of the cloister, which rested against the wall of these bays. Two of these windows contain modern glass, one being inserted to the memory of the present Dean's father. There was once a door in the second bay from the west, which probably was used for processions, and in the seventh bay was a small door opening into the cloister, from which a passage in the thickness of the wall led up by a flight of steps into the Abbot's chapel. This opening has been converted into a muniment room, and is closed by an iron door leading from the aisle. The vaulting of the western part is of stone, and was erected by Sir Gilbert Scott in 1878. The vaulting of the eastern part is fourteenth-century work erected at the time of the reconstruction of this part of the church in Decorated style, and is only plaster. Against the south face of the large pier, at the junction of the Early English and Decorated bays, once stood an altar dedicated to our Lady of the Pillar, with a painting of the Adoration of the Magi above it. Iron railings inclosing the space between this pier and the next to the west formed a chapel set apart for the use of the Guild of St Alban. This guild was founded in the reign of Edward III., but dissolved at the time of Wat Tyler's rebellion. It was the duty of the brethren of this guild to follow the shrine containing the relics of St. Alban whenever it was carried outside the church.