The canoe pitched and tossed dizzily, and by the cold air that surged on his face, and the spray that spattered him, Ned knew that he was moving at rapid speed. Suddenly a cry rang in his ears with the sharpness of a pistol shot and reverberated through the cavern. An instant later he felt a violent concussion on the right, and reaching out his hand he touched the combing of Nugget's canoe.