ed by a triforium and clerestory. There
is a north porch, and two doorways from the cloister on the south
side.

The oldest portion of the building is pronounced to be the eastern
part of the south wall of the south aisle of the nave, where it
adjoins the transept. This portion of the wall consists of three
bays, containing the S.E. doorway from the cloister to the nave, and
three pointed windows in the upper part. The doorway is of the
transition style, and the windows above are simple in style, and are
early pointed work--this part of the building probably dating from
the first half of the thirteenth century.[387] The western portion
of the south aisle of the nave and the whole of the south clerestory
are evidently portions of the restored church of the fifteenth
century.[388] The south aisle wall contains the S.W. and S.E. doors
from the nave to the cloister.

The west end of the nave is in part amongst the ancient portions of
the structure, and the western entrance doorway is thirteenth
century work.[389] The aisle windows of the west front belong to the
first pointed period. The upper portion of the west front above the
two large windows is of considerably later date.[390] "The design of
the west front, which contains above the door-piece two large
windows, with pointed niches and small circles inserted between the
arch-heads, is probably original, but the upper portion and gable,
including the large traceried window, are doubtless part of the
restoration of the fifteenth century. The tracery of the two central
windows is peculiar, and may possibly be of the fourteenth century,
but that of the large upper window is later, probably of the same
period as the restoration of the interior of the nave. The tracery
of the large upper window is a specimen of the late kind of design
employed in Scotland in the fifteenth century."[391]

The interior of the west end of the nave exhibits the change of
style caused by the restoration of the fifteenth century. The first
or western bay of the main arcade is original, including the first
arches (one on each side), the first pillars, and the arches between
them, and the aisle responds. "These pillars and arches are of large
dimensions and first pointed section, and appear to have been
designed to carry western towers, but a part of their