Leaving us in the outer hall, he went away alone for a few minutes; and returning, beckoned us to follow him.
In the inside hall we found a whole section of an outstanding angle moved away, and from the cavity saw a great hole dimly dark, and the beginning of a rough staircase cut in the rock.

As it was not pitch dark there was manifestly some means of lighting it naturally, so without pause we followed our host as he descended.

After some forty or fifty steps cut in a winding passage, we came to a great cave whose further end tapered away into blackness.

It was a huge place, dimly lit by a few irregular slits of eccentric shape.

Manifestly these were faults in the rock which would readily allow the windows be disguised.
Close to each of them was a hanging shutter which could be easily swung across by means of a dangling rope.