of the solid rock; arches thrown up by
craftmen's hands, beautiful in proportion and elegant in form, but
supporting nothing. Tunnels formed here--deep pits there. Yawning
gulfs, where the fetid, stagnant waters threw up their baneful odours.
Here the work is finished off, as if the mason had laboured with
consummate skill to complete his work, so that all the world might see
and admire, although no human eyes, save those of the master's, would
ever be set upon it. Here lies the ponderous stone as it fell after the
upheaving blast had dislodged it from its bed; and there, vaulted over,
is a gulf that makes the brain dizzy, and strikes us with terror as we
look down into it. Now we see an arch, fit to bridge a mountain torrent;
and in another step or two we meet another, only fit to span a simple
brook. Tiers of passages are met with, as dangerous to enter as they are
strange to look at. It must ever be a matter of regret that after Mr.
Williamson's death, some one able to make an accurate survey of the
property did not go through and describe it, because it has been greatly
changed since then by the accumulations of rubbish that have been brought
to every part of it. All the most elaborate portions of the excavations
have been entirely closed up. In one section of the ground (that near
Grinfield-street), where there was of late years a joiner's shop, the
ground was completely undermined in galleries and passages, one over the
other, constituting a subterranean labyrinth of the most intricate
design. Near here also was a deep gulf, in the wall sides of which were
two houses completely excavated out of the solid rock, each having four
rooms of tolerable dimensions.

This chasm is now quite filled up. The terrace extending from
Grinfield-street to Miss Mason's house is threaded with passages, vaults,
and excavations. At the northern corner there is a tunnel eight feet
high, and as many wide, which runs up from what was once an orchard and
garden, to a house in Mason-street. The tunnel is, I should think, 60
yards long. As the ground rises up the hill, there are several flights
of stone steps with level resting-places. About two-thirds up, where the
first flight is encountered, may be seen a portion of a large vault which
runs a short way southwardly. A small portion of the top of the arch,
between it and the steps, is left open, but for what reason I never could
make out. The further end of this vault opens