Tom, in his anguish, thought of something that he had once read of about sharks. He had read that the shark is cowardly, and is kept off by splashing in the water--at least for a time; just as a wild beast is deterred by a fire, or a horse is scared by a log at the road-side. At this thought he grasped. It was his only hope. As he swam, he plashed in the water, with all his force, with arms and legs, making it boil and foam all around him. This retarded his progress somewhat; but at any rate, it seemed to prolong his safety, for the monster did not seem inclined to draw nearer. The moments passed on. They were not far from land,--yet, O, how far that distance seemed to each despairing swimmer! Upon their distance what issues depended! O, that they had thought of the danger in time, or had seen it a little while before! The moments passed on--moments terrible, full of sickening anguish, of horror intolerable! How long those moments seemed! To Tom each moment was prolonged to the duration of an age, and an age of hideous expectation--expectation of a doom so frightful, so abhorrent, that every nerve tingled, and every fibre of his body quivered. And there, through the noise of the splashings made by his own efforts, he could plainly distinguish the movements of the monster behind. It did not seem nearer, but it was near enough to seize him at any moment. Why did the monster delay? Was it his splashings which deterred it? Tom hoped so, and thrust the water aside with greater energy. And now he could hear the movement of the monster a little towards his right. It seemed to him that his pursuer was about to close with him, to attack him from another quarter. He remembered reading somewhere that sharks swim around their prey before seizing it. This movement, he thought, was for that purpose. Every moment he expected to see the dread form of that pursuer appearing between him and Phil, who was nearest. But he dared not look to assure himself. There was too much horror in the awful sight. He dared not turn his head to look behind; he dared not turn his eyes even to one side. He could only keep them fixed, with a wide stare, upon vacancy, straight before him.