G58 APPENDIX XO. I.
with an embrasure flanking the second bridge and
barbican. This bastion and the curtain, which
forms the escarp of the fosse on this side, are of
the best masonry, and evidently tbe last work
completed. The walls are 14' thick, bnilt battering,
and with massive slopes to the embrasures; the
upper part of the wall has been repaired with green
stone. It has been already noticed that at a
distance of 120' from the north-west bastion, the
curtain turns northward, terminating in another
curved bastion built for three guns, which com-
mands the gate in the glacis and the north fosse.
Here commences an inner line of defence, consist-
ing of a circular and semicircular tower, with a
connecting curtain. Between this and the outer
wall a natural depression of the rock has been
taken advantage of to form a second fosse. This
smaller ditch is 57' wide in the widest part. The
outer wall or counterguard is formed by the escarp
of the main fosse.
The banquette of this work is of solid masonry,
and there are platforms for three guns in the
curtain, and two in the redan ; below are large
casemated chambers. On the outer face of the
redan are two rows of embrasures for guns, which
had been worked in the casemate, aud which com-
mand the eastern extremity of the main fosse; and
adjoining them, near the north-eastern angle of
the fortress, there is a small sally-port now blocked
up. At the north-east angle we gain the upper
level of the castle, that is to say, the level of the
inner Baylc, by a flight of twenty steps, near which
point the inner line of defence terminates. At
the top of the steps is a small flanking angle.
with an embrasure flanking the second bridge and
barbican. This bastion and the curtain, which
forms the escarp of the fosse on this side, are of
the best masonry, and evidently tbe last work
completed. The walls are 14' thick, bnilt battering,
and with massive slopes to the embrasures; the
upper part of the wall has been repaired with green
stone. It has been already noticed that at a
distance of 120' from the north-west bastion, the
curtain turns northward, terminating in another
curved bastion built for three guns, which com-
mands the gate in the glacis and the north fosse.
Here commences an inner line of defence, consist-
ing of a circular and semicircular tower, with a
connecting curtain. Between this and the outer
wall a natural depression of the rock has been
taken advantage of to form a second fosse. This
smaller ditch is 57' wide in the widest part. The
outer wall or counterguard is formed by the escarp
of the main fosse.
The banquette of this work is of solid masonry,
and there are platforms for three guns in the
curtain, and two in the redan ; below are large
casemated chambers. On the outer face of the
redan are two rows of embrasures for guns, which
had been worked in the casemate, aud which com-
mand the eastern extremity of the main fosse; and
adjoining them, near the north-eastern angle of
the fortress, there is a small sally-port now blocked
up. At the north-east angle we gain the upper
level of the castle, that is to say, the level of the
inner Baylc, by a flight of twenty steps, near which
point the inner line of defence terminates. At
the top of the steps is a small flanking angle.