d from pillar to
walls, and without ribs upon the groins (such having been its original
condition, apparently), seems pure Norman work.[104] The traces of
painted decoration remaining upon both pillars and vaulting are probably
original. Along the walls the arches spring, not from corbels, but from
short strings of the same pattern with the impost-moulding on the
pillars--a pattern not of very early character. The north and south
walls must, perhaps, be as old at least as the vaulting which rests
against them; nor does the former wall seem quite on the same plane with
the portion of Archbishop Roger's choir foundations visible outside
(between the present choir and the apse), he having perhaps built his
wall against this one. The large limestone buttress against this wall,
and another buttress which rises from the east wall but is hidden by the
vaulting, were added in the Decorated period, and can be followed up
through the two storeys above. They terminate in the pinnacles of the
flying buttresses that span the choir-aisle. The south wall may perhaps
be definitely placed somewhat early in the Norman period, since the
windows are splayed both internally and externally.[105] Of equal age,
probably, is the cross-wall (which, to judge from the mass of masonry
that spans the present passage of communication between the two parts of
the crypt, is very thick) since allowance is made for its thickness in
the spacing of the windows.[106] It is at least as old as the vaulting,
whose bays are arranged to suit it; and moreover the half-pillar against
its eastern side has never been a whole pillar, as the capital plainly
shows. This last remark applies also to the half-pillar against the
extreme west wall, which therefore may perhaps be taken as marking the
westward limit of the crypt at the time when the vaulting was
constructed; while the east wall (excluding the apse) probably marks
the contemporary eastward limit--if, that is to say, the eastern portion
of the vaulting has not undergone alteration. That eastern portion is
clearly planned for an apse or chancel of some kind. The arch that rises
eastward from the last pillar is stopped half-way in its course by a
cross-arch opening into the apse, and the two last groin-ribs are
carried from the pillar to the abutments of the cross-arch, being
obliged by this contraction of span to form the only pointed arches in
the whole vaulting. Such an arrangement--a 'nave' terminating in an
a