northern vestry was added. This
plan, where both chancel chapels were added at much the same time and on
the same scale, is symmetrical. But, as a rule, chancel chapels were
built just when they were needed. At Arksey, near Doncaster, where, as
at St Mary's, Shrewsbury, the walls of late twelfth century transepts
have been largely preserved inside the church in spite of many
alterations, the chancel is a long aisleless twelfth century building
east of a central tower. Towards the end of the thirteenth century, the
north chancel wall was pierced, and a narrow chapel built, which was one
bay shorter than the chancel itself. In the fourteenth and fifteenth
centuries the nave was enlarged, and the south aisle was widened to the
full length of the south transept. A south chapel was added to the
chancel: its outer wall was continued from the south wall of the
transept, and carried eastwards for a little distance beyond the east
wall of the chancel. Thus chancel, south chapel, and north chapel, are
all of three different lengths and breadths, the south chapel being the
longest and widest. When the south chapel was built, a considerable
portion of the old chancel wall was left untouched on its north side. It
is obvious that the methods of building employed in such additions were
those which have been described in connexion with the addition of aisles
to a nave. It is no uncommon thing to enter, as at Tamworth, a chancel
aisle or chantry chapel, and find substantial remains of the old outer
wall of the chancel, which has been pierced with one or more arches of
communication.

Sec. 69. As the relative dates and proportions of chancel chapels vary so
greatly, it is obvious that in many cases only one will be found. We
frequently meet with churches which have only one aisle to the nave; but
these are for the most part small buildings, and one aisle usually, in
larger buildings, presupposes another, although symmetry of proportion
need not be expected. However, many important churches have one chancel
chapel, and no more. Raunds in Northamptonshire, and Leverington in
Cambridgeshire, have south, but not north, chapels. Stanion in
Northamptonshire, and Hullavington in Wiltshire, have north, but not
south chapels. In both these last cases, the chapels are simply
continuations of the aisles, without a break or intermediate arch; and
the chapel at Stanion is neither more nor less than a second chancel. As
the dedication of Stanion chur