Remembering what Sir Arthur had told them, he looked anxiously at the surface of the lake, but the water was calm and quiet, and the raft hung motionless. "The outlet is far beneath the surface," said Canaris. "You can tell that by the sound. If it were near the top we would be instantly sucked under." Impelled by an irresistible impulse Guy seized the torch and held it above his head. "Look! Look!" he cried, in a voice that trembled with excitement. "The cliff slants at an angle. There are crevices to hold one's hands and feet. Make no noise, Canaris; don't wake the rest, but help me to reach that ledge yonder and I will see where this leads." The cliff slanted indeed, but at an almost imperceptible angle. The raft tilted slightly as Canaris pushed Guy up the face of the rock, but the latter succeeded in reaching a small ledge six feet above the water. "All right," he whispered. "I can see plenty of places to catch hold of beyond me. Now fasten a torch to one of the paddles, Canaris, and hold it as high as you can." This was a clever suggestion. The Greek fortunately had a bit of cord about him, and in a moment the torch was throwing a dull light far up the rugged slope of the rock. Guy continued to climb higher and higher, keeping a cool head in spite of his excitement, and testing well each crevice or projecting ledge before trusting his weight to it, and at last, with a throb of joy that nearly took his strength away, he pulled himself out upon the flat summit of the rock. Seventy feet below him was the raft and its occupants, glowing in the torchlight. Guy crawled forward on his hands and knees, and soon reached the verge of the rock on the other side. The running water was below him, much farther, indeed, than the level of the lake, but the roar of the torrent was loud and distinct to the ear. He turned and crawled back. "Canaris," he whispered down, "I have reached the top of the cliff. There is running water on the other side. Waken the rest as quickly as possible, and send some one up with a torch. I forgot to bring one with me." CHAPTER XXXI. A TERRIBLE BLUNDER. From his gloomy perch on top of the rock Guy could see all that happened plainly. Canaris woke his companions as speedily as possible. Their astonishment at finding Guy missing was very great, and at first they seemed scarcely able to comprehend the Greek's explanation. Then they glanced eagerly overhead; and hailed Guy with shouts of joy. "Here, hoist me up," cried the colonel. "I'll take him up the torch." "No, I'll go!" exclaimed Forbes. "I'm a pretty expert climber, colonel, and won't run any risk." "Bless me!" ejaculated Sir Arthur. "Did that young man Chutney walk up the face of that wall? Why, he's a freak." Canaris solved the matter by picking up one of the leathern bags and tearing it open. "Look!" he shouted up to Guy. "It was fortunate we kept these. Here are the ropes and hooks by which we scaled the walls of Harar."