Suddenly, above the hiss of our rapid progress, there could be heard strange noises, as if a hundred war-drums were being beaten, and at the same instant our curious conveyance gave another sudden lurch in rounding a corner. At that moment Goliba, in turning to speak with Omar, had unfortunately loosened his hold of one of the handles, and the sudden jolt at such a high speed was so violent that our faithful guide and friend was shot off backwards, and ere Omar could clutch him he had disappeared with a shriek of despair into the cavernous darkness. A thrill of horror ran through us when we realised this terrible mishap. Yet nothing could arrest our swift headlong descent, and feeling convinced that Goliba, our host and adviser, had met with a terrible death, we sat staring, motionless, wondering whither we were bound, and how, now we had lost our guide, we should be able to reach the surface again. At the moment Goliba had been flung off we remembered that the iron frame had jolted and grated, and there seemed no room for doubt that the generous sage had been mangled into a shapeless mass. The thought was horrible. At last, however, we felt the air becoming fresher, and the strange contraction in our breasts was gradually relieved as our pace became less rapid, and distant lights showed before us. Then suddenly we emerged from the curious shaft down which we had travelled to such enormous depth, gliding slowly out into a place of immeasurable extent, where a most extraordinary and amazing scene met our gaze. Truly, poor Goliba had spoken the truth when he had promised that what we should witness would astound us. CHAPTER XXIII. UNDER THE VAMPIRE'S WING. WHEN our dazzled gaze grew accustomed to the garish blaze of lights we found ourselves standing in an enormous cavern. Around us were glowing fires and shining torches innumerable; the smoke from them half choked us, while above there seemed an immensity of darkness, for the roof of the natural chamber was so high that it could not be discerned.