By this time it was beginning to get hot, there on the shelterless wreck. A small steamer passed in the distance. Mahoney tore off his shirt and waved it wildly, on the chance that some one on the steamer might at that moment have a telescope pointed in his direction. The steamer went its way. Mahoney put on his shirt again, and wished he had not lost his hat. He had a handkerchief, however, and this he wound upon the top of his head like a turban. By wetting it frequently he kept his head and neck cool. As the morning wore on, no fewer than five sails appeared on the horizon, but none came near enough even to excite a thrill of hope. Since there was nothing better to do, Mahoney was wise enough to keep as still as possible, watching the strange life that went on beneath his refuge, and splashing water over himself from time to time that his skin might absorb some of the liquid, and so the dreaded torment of thirst be a little postponed.

The blazing sun dragged slowly past the zenith, indifferent to Mahoney's maledictions. Along in the afternoon a three-masted schooner hove in sight. There was not enough wind, now, to ruffle the tops of the swells; but there was some breeze up aloft, apparently, and the schooner, with all her canvas spread, was catching it, for she moved along at a brisk pace. Her course brought her so near that Mahoney tore off his shirt in trembling anxiety and waved it at arm's length, jumping as high as he could in the struggle to make himself conspicuous. Finding this fruitless, he then tied the shirt to the sleeves of his white duck coat, making a long streamer, which he thought the lookout could not fail to see. Notwithstanding all this frantic effort the schooner sailed on unheeding. From its decks the waving white streamer, if seen at all, would have looked like nothing more than an agitated streak of foam. But to Mahoney it seemed that he was being wantonly and brutally ignored. With a pang he realized that his excitement and his effort had accomplished but one thing. They had brought on the thirst! His throat was parching. He had an impulse to break out into a volley of hysterical curses against the retreating ship. But his self-respect withheld him. Leaning over the bulwarks, he murmured to the great green prowling shape of his submarine jailer:

"You're no worse than lots of men, you ain't, damn you!"

As if in answer to this equivocal compliment the shark sailed in to within a little more than arm's length of the bulwark, and looked up at Mahoney with cold, malignant eyes. Mahoney kicked at him hysterically, then turned away and drenched himself where the little waves ran up shallow over the slope of the deck. The cool of the water on his skin, particularly on his throat and wrists, did actually, though slightly, ease his thirst.

The night fell windless and clear; and for a time, so black were the shifting reflections on the swells, so confusing the phosphorescent gleams that shot up through the waters, that Mahoney could no longer see the stealthy prowling of the great black fin. Lashing himself to the bulwark by the sleeves of his shirt, he snatched an hour or two of troubled sleep. Once he woke with a shock of disappointment from a dream that the bottom had fallen out of a jug of water which he was just raising to his lips. Again he started up shouting, and struggling fiercely with the bonds that held him safely to the bulwark. He had dreamed that a glittering white steam-yacht was speeding close past his refuge,—so close that he had to look up at her rail,—yet the people on her deck most unaccountably failing to see him. From this waking he fell back weak and hopeless, and it was some minutes before he could get his nerves under their wonted cool control. He had no longer any desire for sleep, so he devoted himself again to soaking his wrists in the water and letting the lambent phosphorescence stream through his fingers.

"ONLY THAT SHARP BLACK FIN, THAT PROWLED AND PROWLED, KEPT ALWAYS IN SIGHT"

At last the moon rose over the waste of sea. Across the shimmering silver pathway of its light sailed a far-off ship, small and black. Mahoney gazed at it with longing. An hour or two later another ship crossed the radiant pathway. But none came near the wreck. Only that sharp black fin, that prowled and prowled, kept always in sight, always near, till Mahoney began to wonder if it were really possible that the tireless monster would get him in the end. He registered a vow that if he should find himself growing delirious with thirst he would lash himself so securely to the bulwark that, come what might, the shark should never get his body. Comforted by this resolve, and the torment of his thirst mitigated a trifle by a drenching in the brine, Mahoney fell asleep again, and did not wake till the sun was streaming savagely on his face.

Untying himself from the bulwark, Mahoney stared about him wildly. A tall-masted brig, with royal and topgallant sails drawing full, was retreating in the distance. Apparently, it had passed not far from the wreck. Mahoney cursed himself wildly for having allowed himself to fall asleep. This had been perhaps, his one chance. No other sail was in sight. There was nothing but a wisp of smoke on the horizon, betraying the passage of an unseen steamer. Mahoney found that he was babbling to himself about it, and the realization shocked him. He shook himself, pulled his courage and his nerve together sharply, then took off his clothes and splashed himself with water from head to foot. It was certain that his thirsty skin must absorb a good share of the liquid so generously applied to it; and thus assuring himself, his thirst became, or seemed to become less intolerable. When he had dressed again,—leaving off his shirt, which he kept tied to the bulwark ready for instant use,—he leaned over and peered down into the smooth water to look for the shark.

Grim and spectral, the great shape was just in sight, rising with strange indolence toward the surface. Evidently, some good-sized victim had just been devoured. The shark came to rest within a few inches of the surface, where the sun could warm its rough back through the thin barrier of the water. There it lay, apparently basking, with the content of one that has well dined. The complacent malignity of its eyes, which seemed to meet the man's eyes with a peculiarly confident menace, filled Mahoney with rage. He tore savagely at the bulwarks, in a foolish attempt to provide himself with a missile.