The tower rises in four stages above the transepts. The second storey is pierced with loopholes. The third has two pointed windows lighting a room immediately below the belfry. Between these, in a niche with a canopy, is the figure of an angel holding a drawn sword. On his head is fixed a tablet to support another figure. There is only one window in the fourth storey, which gives light to the belfry, and is very large. Its labels are ornamented with very vigorously carved heads, and the cornice above is decorated very much like that of the clerestory. The tower terminates in an embattled parapet.
All the windows have been thrown out of centre by the addition of the lower turret.
Originally the tower was crowned by a leaden spire about fifteen feet in height, but this was removed at the end of the seventeenth century on account of its decayed condition.
On the east side of the tower there is a single window in the third storey. In place of a second window there is an opening into the roof of the choir. This leads into a passage running from the tower to the east end.
The bold attempts to veil the inadequate size of the tower by the addition of two turrets can be best studied from this side.
The North Aisle of the Choir consists of eight bays, all Early English, except the easternmost one (the retro-choir), which is Late Decorated; while the western bay has a Perpendicular window.
Sometime in the fifteenth century the third bay from the east, in each aisle, was altered and a large Perpendicular window inserted in order to admit more light to the sanctuary. During the restoration of the cathedral these later windows were removed, and replaced by careful copies of the other Early English windows.
The basement is composed of bold mouldings with a plain wall equivalent in height to the internal wall arcade. Over this, a string-course runs uninterruptedly round the choir just below the windows.
