"At the bottom of the chamber C a very narrow passage turns at a right
angle and gives access to a large hall E that is sustained by a pillar
F. This pillar is three feet square and the vaulted chamber may be 15
to 18 feet square and 5 feet high. On the left a great pier G allows of
two passages I I which lead to the other openings that gape upon the
road, and turning to the right give access to the further depths of the
underground retreat. A passage H is, however, the most direct means of
communication between the cavern E and the larger hall J to which also
access is obtained through the openings I I separated by the pillar S.

"The cavern J, the largest of all, is 25 feet long by 15 feet wide at
the one end and 24 feet at the other. It is supported by the pillar K,
shaped to suit the widening of the hall. At the bottom of this chamber
is a staircase L descending from the floor and without any breastwork
to protect it, and therefore dangerous, as it goes down 6 feet, and is
but about a foot and a half wide. This staircase is 12 feet long, and
the passage M that is a continuation of it is hardly more than 4 feet
high at the entrance, and is nearly 20 feet long, so that one has to
creep along it, bent double, assisted by one's hands.

"In this position it is absolutely impossible for one to turn round, so
narrow is the passage. At this point a difficulty that is not
anticipated arrests many a visitor. Water rises through the stones that
form the floor and contributes to reduce the height of the gallery. If
one elects to continue, there is no choice but to take a bath that
reaches to one's middle. At a distance of nearly 7 feet comes a right
angle, and the passage goes on for 6 feet, then turns to the left by an
obtuse angle and pursues its course for 12 feet, then again turns to
the right by another obtuse angle, and for 15 feet more one is still
half under water, till N is reached, after which the level of the floor