His tones found an echo in those of his companions. The precipice in front was a continuation of the lofty perpendicular cliff which fell away from the front of their halting place. Any one who should go over that giddy brink would leave no sort of shadow of uncertainty as to his fate. They stopped in their pursuit. "Tom!" cried Eustace persuasively, "Come back, old chap. It's going to rain like fits in a minute. You'll be much snugger at the camp." The lunatic, now half-way across the open, stopped at the voice and stood listening. Then he ran forward again, but at a decreased pace. Heavens! He was only twenty yards from the brink. His pursuers were more than twice that distance behind. Any move forward would inevitably have the effect of driving him over. "What _are_ we to do?" gasped Hoste, exhausted by the mingled exertion and excitement. "We had better leave him alone, and watch him from where he can't see us," was Eustace's reply. The poor fellow had now gained the very brink. Then he turned, but his pursuers had deftly concealed themselves behind a small bush which opportunely grew in the midst of the open. His hands were still tied fast, and the gag was in his mouth. If only they could have reached him. He stood for a moment, balanced on the edge of the abyss, looking _into it_. Then he turned again. There was a horrible leer of triumphant insanity upon the distorted face as his gaze failed to discover the presence of anybody likely to prove hostile. The thunder rolled out heavily from overhead, and the figure of the maniac stood in bold relief against the leaden sky, photographed in black relief against the red flashes of lightning which played with well-nigh unintermittent incandescence athwart the storm cloud beyond. There he stood, his features working horribly, the tangled masses of his beard and hair floating in the fitful gusts which came whistling up from the dizzy height. Never, to their dying day, would the spectators forget the sight. Yet they could do nothing. With a choking cackle, like an attempt at a laugh, the maniac turned again to the awful height. The spectators held their breaths and their blood ran cold. Then they saw him gather his legs beneath him and spring far out into space. Petrified with horror, they rushed to the brink and peered over. The smooth rock face fell without a break down to the tree-tops at a dizzy depth beneath. These were still quivering faintly as though recently disturbed. But at that moment heaven's artillery roared in one vast deafening, crackling roll. The air was ablaze with vivid blue flame, and driven before the tornado blast, sheet upon sheet of deluging rain crashed down upon them, beating them to the earth by the very weight and fury of its volume. CHAPTER FORTY EIGHT. ENVOI.