V. The first impression, on entering the _nave_, is produced by the lofty Norman piers. [Plate I.] The whole arrangement differs much from that of the great Norman naves of the Eastern cathedrals, Norwich, Ely, and Peterborough. In them the divisions of the nave-arcade and of the triforium above it are very nearly equal in height and width, whilst the clerestory range is of little less importance[5]. At Gloucester, the massive nave piers are carried to such a height (30 feet) as to afford little space for the triforium, which is only a narrow wall passage; and the original Norman clerestory, the circular arches of which may still be traced below the Perpendicular windows, was of nearly the same dimensions. The height of the piers is thus made to seem greater than it really is. They must have been still more remarkable when the floor of the nave was at its original level, ten inches lower than at present. The bases of the piers stood on square blocks; and there still exist some remains of an encaustic floor on the lower level. These massive circular piers, which are found also at Tewkesbury, at Pershore, and at Malvern Priory, seem to be peculiar to England. They do not, at any rate, occur in any church in Normandy, where the rectangular form prevails. The good effect of carrying them to such a height as at Gloucester is perhaps questionable, since the necessary result is to deprive both triforium and clerestory of all dignity and importance.
The nave consists of nine bays, from the west front to the central tower. Of these all are Norman to the top of the triforium, except the two western bays, which are Perpendicular, (Abbot Morwent’s work). The Norman clerestory was altered, and the Norman portion of the nave was newly vaulted, in the first half of the thirteenth century. (The nave roof was completed in 1242. The monks themselves, according to Froucester’s Chronicle, laboured at it,--considering, suggests Professor Willis, that they could do the work better than common workmen.) The nave _piers_ have plain bases and cushioned capitals. The arches have the zigzag in the outer moulding and a double cable in the soffete. A cable moulding runs along above them. In the _triforium_, two arches in each bay circumscribe four smaller ones, the tympana above which are quite plain. In constructing the new _clerestory_, the Norman work immediately above the triforium arches was entirely removed; and only the jambs of the side lights which extended beyond the triforium arches, with the wall between them, were allowed to remain. The jambs of these Norman lights, with zigzag moulding, may still be traced in each bay of the clerestory. The windows of the Early English clerestory were filled with Perpendicular tracery, possibly by Abbot Morwent.