The central shaft, on the north side, is twisted. Two of the central shafts, on the south side, are richly ornamented--one with twisted decoration, the other with a projecting reticulated pattern. The shaft and sub-arches of the second bay from the east on this side is a modern renewal, as here also the old work was destroyed in 1820 to make room for a pew. The north triforium can be reached by a staircase continued up into the tower, entered from the western part of the aisle; access to the south triforium can only be gained by the use of a ladder. The north triforium deserves examination. It will be found that pointed arches have been added at the back, and buttresses have been built against the back of the wall behind the arches; the floor is rendered uneven by humps necessitated by the Early English vaulting of the aisle below--probably the aisles were originally covered with a barrel roof. At the east end of the north triforium an arch may be seen, which once opened out into the transept; this is now walled up, and traces of painting may still be seen on it. There is a passage under the clerestory, to which access may be obtained by a passage across the transept; this was, no doubt, made in order that the shutters of the windows might be opened or closed, according to the state of the weather. From the staircase which leads up to the north triforium a passage leads into the chamber over the north porch. This is a large room, about 40 feet in length from north to south, and is now used as a practising room for the choir; it is fitted with benches and a grand piano, and has a modern wooden gallery running along its south end. [Illustration: THE NAVE IN 1834.] [Illustration: THE NAVE.] [Illustration: NORTH ARCADE OF NAVE.] [Illustration: FROM THE NORTH TRIFORIUM.] [Illustration: BAY OF THE TRIFORIUM, SOUTH SIDE.] The #South Aisle# is much more elaborately decorated than the north. Along the south wall runs a fine Norman arcade, the arches ornamented with billet and cable moulding. The window in the western bay is the original Norman one; the others were altered either in Early English or Decorated times, and are now filled with modern tracery in the Decorated style designed by Mr Ferrey. In the third bay is a holy water stoop, and in the fifth a large aumbry or recess, entered by a door; in this used to be kept the bier and lights used at funerals. Along the walls of each aisle runs a stone bench. There is no arcading on the wall of the north aisle. The vaulting of both aisles is Early English, dating from the time of Peter, the third prior, who, as previously stated, built the clerestory. The tracery of the north aisle windows is transitional in character between Early English and Decorated. [Illustration: THE SOUTH AISLE OF NAVE.] [Illustration: THE MONTACUTE CHANTRY.]