In the exterior of the north wall, and near the buttress at the east
end, there has been an ambry. This ambry, together with the absence of
buttresses on the north side, seems to indicate that there was a
building on that side, probably in the form of an aisle, connected with
the cathedral. The eastmost portion was probably the sacristy, which
would enter by the north doorway. On the south side of the church the
wall, with its buttresses (see Fig. 668), has evidently been the
exterior of the church. It contains a segmental headed modern window in
each bay. The south buttress of the east wall is widened at the lower
part, and contains a round arched recess, in which there has probably
been a monument. The east end has been greatly altered, and has had a
staircase block built against it, and a gallery door and high window
inserted.
[Illustration: FIG. 671.--Lismore Cathedral.