octagonal, but that at the south-west is circular till it reaches the
string course below the parapet; and excepting those on the north-west
and south-west they are used as staircases. Each of the four sides is
pierced by two groups of coupled openings under superior arches, the
several moulded members of which rise in four receding orders from the
square abaci of the capitals of the angle shafts. The space between
the pointed heads of the sub-arches on the east and west faces is
pierced by quatrefoils; those on the west are different in design from
those on the east.

The parapet of the tower has features in its design which indicate
that the original one W been added to the earlier tower during the
fifteenth century. The octagonal terminations to the four turrets were
of the same character and date as the parapet.

[Illustration: _Photochrom Co., Ltd., photo._ THE DETACHED
BELL-TOWER.]

The spire rises out of the supporting walls of the tower within the
parapet. It is a regular octagon in shape. Four octagonal pinnacles
are placed at its base next to each of the turrets of the tower; and
between these, on the other four faces of the spire, are tall stone
dormers, with carved crockets and finials on the copings of the
high-pitched gables. Above this group the spire is divided into three
sections by two bands of diaper-work cut out of the stone surfaces as
cusped quatrefoils; and from the base of the spire to its capstone
there is a projecting rib on each angle between the several faces of
the octagon.

The #Bell Tower#, which stands alone to the north of the cathedral,