The walls of this underground cavern have been hewn out of the earth.

The surface of the walls has been blasted by some fierce flame, and is

permanently scorched black. In the centre of the cavern is a shallow

iron pit, filled with burning pitch that gives off an intense heat.

Over the pit, in the ceiling of the cavern, is a rectangular shaft

which leads upwards into the rock. A broad stone outcropping against

the wall makes it possible to reach this shaft.