"A hundred feet beneath me was a lake of fire! That is the only way I can describe it: a seething, bubbling lake of fire. And above, where the roof of the cavern formed a natural cone, was a square section formed of massive stone blocks, and quite obviously the handiwork of man. The bars were too hot to touch, and the heat was like that of a furnace, but while I stood, peering first upward and then downward, a thing happened which I almost hesitate to describe, for it sounds like an incident from a nightmare.
"Heralded by a rumbling sound which was perceptible above the roar of the fire below, the centre block in the roof slid open. A tremendous draught of air swept along the passage in which I was standing, and doubtless along other passages which opened upon this hell-pit.
"As if conjured up by magic, a monstrous column of blue flame arose, swept up scorchingly, and licked like the tongue of a hungry dragon upon the roof of the cavern. Instantly the trap was closed again; the tongue of fire dropped back into the lake from which it had arisen on the draught of air.
"And right past me where I stood, rigid with horror, looking through those bars, fell a white-robed figure—whether man or woman I could not determine! Down, down into the fiery pit, a hundred feet below!
"One long-drawn, dying shriek reached my ears.
