dded: its date is pretty clearly determined
by the east window, in which we notice some signs of the approaching
change from the Early English simple lancet into the plate tracery of
the Decorated period. Rickman gives its approximate date as 1220. During
the fourteenth century the nave aisles were widened and extended farther
west, and at the same time two bays were added to the nave itself. The
Norman chapels on either side of the choir were lengthened into aisles,
not, however, extending as far to the east as the thirteenth-century
presbytery; arches were cut in the Norman choir walls to give access
to these new aisles. The transepts were lengthened, the south one by
raising the walls of the Norman chapel mentioned above, which, it has
been conjectured, was used as the Lady Chapel, the north transept by
the addition of Bembre's chantry.

During the fifteenth century the western tower was built 1448-1464,
and probably at the same time the walls of the nave were raised; and
the roofs of the nave aisles, which had been much lower than now, so
as not to block up the Norman clerestory windows, were raised on the
sides joining the nave walls above the heads of these windows, and a new
clerestory was formed in the raised wall. This contains five windows on
each side, each window being placed over one of the piers of the nave
arcading.

During the Early English period, probably by John de Berwick, who was
dean from 1286-1312, a spire was added to the central tower. This was
for long in an unsafe condition, and at length, in 1600, it fell. The
following is the description given by Coker, a contemporary writer:
"Having discoursed this longe of this church, I will not overpasse a
strange accident which in our dayes happened unto it, viz. Anno Domini
1600 (the choire beeing then full of people at tenne of clock service,
allsoe the streets by reason of the markett), a sudden mist ariseing,
all the spire steeple, being of a very great height, was strangely cast
downe, the stones battered all the lead and brake much timber of the
roofe of the church, yet without anie hurt to the people; which ruin is
sithence commendablie repaired with the church revenues, for sacriledge
hath not yet swept awaye all, being assisted by Sir John Hannam, a
neighbour gentleman, who if I mistake not enjoyeth revenues of the
church, and hath done commendablie to convert part of it to its former
use." Other accounts mention a tempest at the time of the f