In the aisles, each bay has two lancet windows, except the easternmost bay on the south side, which has only one. In the jambs are slender Purbeck shafts, twice banded. Just beneath these windows, an arcade of trefoiled arches runs along the whole length of the nave, being continued on the screen walls to the western chapels. The arches are deep, with bold mouldings, and are supported by clustered columns. There are five arches in each bay, but they are not placed in the same manner on both sides of the nave. On the south, the arches are arranged in groups of five, with blank spaces of wall between, in front of which pass the vaulting-shafts. On the north, the arcade is continuous, and is so arranged that each cluster of shafts supporting the vault passes in front of an arch. The work on the south side is more elaborate; tooth ornament is used, a string-course runs along at the height of the capitals, and foliaged bosses are found in the lower corners of the spandrels. In addition to the clustered vaulting-shafts already mentioned, there is a single vaulting-shaft in the centre of each bay, between the windows, rising from a corbel above the wall-arcade. On the north side these corbels merely have plain mouldings, but on the south side they are foliated. The arrangement of the vaulting-ribs is different in the north and south aisles; and in the latter it will be noticed that some of the bosses have figure-subjects, besides the foliage met with on the north side. The _Agnus Dei_ carved on the boss in the fourth bay from the west should be noticed. To such minor differences, continually found in the corresponding parts of a Gothic edifice, the style undoubtedly owes a peculiar charm. In the case of the nave at Lincoln, they probably indicate a slight difference in the date of erection, but they certainly point to a far greater scope for individuality being accorded to the masons than was allowed in the rigidly symmetrical styles of the Renaissance. The chapel at the south-west corner of the nave is used as the Consistory Court, and that opposite to it was reappropriated to its ancient use as the Morning-Prayer Chapel by the late Archbishop Benson, when Chancellor of Lincoln. A small brass tablet to his memory has recently been fixed to the wall by the side of the altar. Both chapels are stone-vaulted, but the northern has a feature which is not found in the Consistory Court. This is the slender Purbeck column in the centre, erected to support the vaulting. In this chapel was formerly placed the massive font of black basalt, which was removed in 1874 to its original position in the second bay from the west on the opposite side of the nave. The font is of Norman workmanship, and apparently dates from the time of Remigius (1067-92). There is another of a similar character in the cathedral at Winchester. The basin is square, and rests on a massive circular drum in the centre and four small columns at the corners, supported by a square base.