An instant later the shadowy object assumed the unmistakable form of a huge drift log, and before Ned could realize his peril or deal a single paddle stroke, the current whirled the heavy mass upon him, and the blunt end pounded broadside into the Pioneer. The canoe was bowled over like a tenpin, and Ned went head first into the yellow flood. He came to the surface a dozen feet below, and when he found he was out of his depth he made a valiant effort to swim up to Randy, who was fighting hard to drive the Water Sprite off the island, so that he might hasten to his friend's rescue.