Clement, was bishop (1233-1258), he made a pilgrimage
to Rome, and represented to the Pope among other things that "its rents
were barely sufficient to maintain him for six months; there was no
place in the cathedral wherein he could lay his head; there was no
collegiate establishment, and that in this unroofed church, the divine
offices were celebrated by a certain rural chaplain."[161] Evidently the
fourth part of the tithes of all the parishes within the diocese were
given for the support of the bishop and the building of the cathedral,
and he left it "a stately sanctuary, rich in land and heritage, served
by prebendary and canon." Bishop Clement built the nave, the most
beautiful part of the structure, but later in its architecture than the
north aisle of the choir or lady chapel, which was originally separated
from the choir by a solid wall, in which there never was any opening
into the aisle except the small doorway near the east end, which is of
First Pointed date.[162] Above the vault there is an upper storey with
small two-lighted windows, which may possibly have been used as a
scriptorium.[163] The cathedral consists of a nave of eight bays, with
north and south aisles, an aisleless choir of six bays, an eastern aisle
unconnected with the choir except by a doorway, and the tower attached
to the south aisle of nave. The following is a narrative of the building
of the cathedral as given by the most recent authorities. "The greater
part of the structure is of First Pointed date. The lady chapel may be
the oldest part (after the tower), and next to it is the east portion of
the nave. The western half of the nave seems to have followed soon after
the eastern portion, and is carried out nearly after the same design.
The transition tracery in the arcade of the clerestory and west end is
very interesting, as showing bar tracery in the act of being formed.
This could scarcely have occurred in Scotland before the end of the
thirteenth century. The style of the choir is further advanced than the
nave, and exhibits some transitional features between First Pointed and
Decorated work. The great east window and the large side windows of the
choir probably contained tracery more advanced than that of the west
end, and may probably date from the fourteenth century. The pinnacles
and parapet are of about 1500."[164] The west end, with its doorway,
deeply recessed with shafts and mouldings of First Pointed work, with an
acutely po