treatment of older methods that was being developed experimentally is
shown by the portion which was added to the lady-chapel during the
episcopate of Gilbert de Sancto Leophardo. The architects and
master-builders devised for him the two new eastern bays complete,
together with the larger windows that were inserted in the walls of
that part of the chapel already built. Here again, as in the work set
in motion by his successor, the designers and builders made no attempt
to add these new portions in imitation of earlier ones. Then it was
Bishop Langton who, between 1305 and 1337, spent £340 "on a certain
wall and windows on the south side, which he constructed from the
ground upwards." [9] This work is principally to be seen in the great
south window of the transept, under which he provided for himself a
"founder's" tomb. In the gable above a rose window was inserted,
following the example of that earlier one in the east end of the
presbytery. The chapter-house above the treasury, or sacristy, was
also added when the new windows were inserted in the lower walls.
About the same time the doorway to the nave within the western porch
was constructed.

[9] Bishop Reade's Register.

[Illustration: THE SOUTH TRANSEPT, ABOUT 1836. _From Winkle's Cathedral
Churches_.]

Walcott shows by his study of the early statutes of the cathedral that
"in 1359 the first fruits of the prebendal stalls were granted to the
fabric; and in 1391, one-twentieth of all their rents was allotted by
the dean and chapter to the works, which embraced works round the high
altar, for, in 1402, materials 'ad opus summi altaris,' were stored in
S. Faith's Chapel. A 'novum opus,' a term applied to some special