_North-West Tower._—Bearing in mind the character of this masonry, pass out into the north aisle of the nave, and proceed to the Norman tower at the end of it. The work here is clumsy and massive, but far superior to that of the north transept, _c._ 1120. The north wall of the nave (now covered with mosaics) is also Norman. Other traces of the Norman cathedral will be found in the north aisle of the choir, to which we retrace our steps. On the right will be seen a great circular capital upside down, which has been used as a foundation for the north-east pier of the tower. A few feet farther is one of the original circular bases, proving that the Norman choir had vast circular piers like those of Gloucester, Durham, and St. John’s, Chester. Two bays farther east will be found in the pavement a semicircular band of dark marble. This marks foundations that have been found of the apsidal ending of this aisle; one of the stones of this Norman apse remains in the pavement. Moreover, it has been found that the central aisle of the choir, at the end of the second bay from the tower, ended in a semicircular range of columns, like St. Bartholomew’s, Smithfield. From these indications we can restore the plan of the original Norman cathedral with some certainty. It had a nave and aisles of the same dimensions as the present ones; unaisled transepts, each of a single bay, and an eastern apse to each transept; perhaps a low central tower; a choir of two bays, ending in a semicircular range of columns and arches, and surrounded to the east by a semicircular ambulatory or processional path. On either side were aisles, three and a half bays long, each terminating in an eastern apse. So that the Norman cathedral had five eastern apses, and resembled in plan Gloucester and Norwich, except that the chapels of the choir-aisles of Chester point, not north-east and south-east, but due east. [Illustration: NORTH TRANSEPT.] _Norman Cloisters._—Returning to the north aisle of the nave we pass through the doorway at the east end of the aisle into the cloister. This doorway, as seen from the cloister, is, from its ornamentation, of later date than the north transept, and may also be about 1120. The south wall of the cloister is now seen to be Norman; Norman abbots are buried in the recesses. Passing along the cloister westwards, we have in front another Norman door, and a very late Norman passage. Passing along the west walk of the cloister, a doorway on the left leads into a large Norman undercroft, with two aisles roofed with massive unribbed vaulting. Above, as the division in the vaulting shows, were a large and a small hall. These buildings on the west of the cloisters may have been originally the cellars, refectory and dormitory of the lay brethren, as at Fountains and Kirkstall; and afterwards the cellar and halls of the Abbot’s house. To the south, above the late Norman passage, is the Episcopal chapel, also Norman, with good Jacobean work.