[21] Mr. Dollman holds that the cinquefoil tracery occurred in both divisions, but has omitted it from the upper lights in his drawing of the west elevation, as it appeared before it was finally destroyed. [Illustration: _Photo._ _G.P. Heisch._ THE NORTH CHOIR AISLE.] CHAPTER III THE INTERIOR The =Nave= was entirely rebuilt by Sir Arthur Blomfield in 1890-1897. Not the least difficult part of the architect's work was the removal of the unsatisfactory structure, of 1839-1840, without destroying the few Norman and Early English features imbedded in the plaster and brickwork, which it was desired to recover as far as possible, and preserve intact and _in situ_. This has to a great extent been done, thanks to the care with which the debased nave was taken to pieces, every stone that was worth preserving being carefully released from its accretions, measured, and reinstated in its proper place in the new work. Fortunately the earlier nineteenth century builders had not disturbed the bases of the old piers, but had contented themselves with building round them, and when their superstructure was cleared off, enough of the old work remained to show the position of every pier, as well as the lines of the original ground plan. In nearly every part also the old foundations were found satisfactory, though, of course, they were thoroughly tested, and renovation generally applied. The old lines have been adhered to throughout the restoration, and the new nave is a practical reproduction of its Early English predecessor in every detail, with the single exception to be afterwards noticed. This minute adherence to the original includes such intentional irregularities as the unequal distances between the piers and the varying width of the aisles, which not only differ from each other, but are not of the same width throughout in each case. Ancaster stone has been chiefly employed, except in the roof, where the ribs of the vaulting are of Bath stone, the filling being made up of chalk and firestone.