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ECCLESIASTICAL ARCHITECTURE 475
mullions ofthe windows are carried down below the window/
sills on the exterior to interpenetrate the hoodmoulds of the
windows of the undercroft and so form a web of tracery lines
over the whole exterior ofthe building. Another motif, also as it
seems deriving from French is
practice, to enclose an arch in a
rectangular moulded frame and to fill the spandrels so formed
with a pattern ofcusped arch/headed
panelling. This motif is
found in the lower parts of St. Paul's chapter/house design and
on a magnificent scale in the interior of St. Stephen's chapel,
as recorded by the
nineteenth/century draughtsmen who saw
that building before the fire of 1834. These two motifs were
scale in the new eastern limb of
exploited on a grand
Gloucester. A large part ofthe
original eleventh/century struc/
ture at Gloucester was allowed to remain up to the top of the
tribune level. The original clerestory was removed and a new
clerestory with very tall windows built on top of the Roman/
esque masonry, the whole being covered.with the vault already
mentioned, the vault shafts of which were carried down un/
broken to the floor. The mullions of the clerestory windows
were also continued down across the face ofthe Romanesque
tribune and even below the arches ofthe Romanesque arcade.
They were linked at intervals by horizontal mouldings so as to
form a web of panelled tracery largely disguising the Roman/
esque structure behind them which, however, is in part visible
and lends a sort of piquancy to the contrast ofthe earlier struc/
ture with the new additions. The actual form of this
tracery
screen seems largely derived from the second ofthe two motifs
we have mentioned at St.
Stephen's. The outstanding quality
of the work at Gloucester is its
extraordinary ingenuity. The
Romanesque church had been built with a three/sided apse and
ambulatory; the whole ofthis apse was removed in the course of
the new work, and the last bays ofthe central vessel were canted
outwards slightly to the north and south; the east end was then
filled with a colossal window composed of cusped tracery
panels, the effect ofthe canted bays being to disguise the angles
ofthe main structure with the east window so that in the longi/
tudinal vista the whole east end of the church appears to be