Far into the night there was revelry on board the "Flitter," more guests having come out from the city. The dark hours before the dawn of day had arrived before they put off for shore, but the fisher boats still were bobbing about in the black waters of the harbor. The lights gradually disappeared from the port-holes of the yacht, and the tired watch was about to be relieved. Monty Brewster and Peggy remained on deck after the guests had gone over the side of the vessel. They were leaning over the rail aft listening to the jovial voices of the visitors as they grew fainter and fainter in the distance. The lights of the town were few, but they could plainly be seen from the offing. "Are you tired, Peggy?" asked Brewster, with a touch of tenderness. Somehow of late he had often felt a strange desire to take her in his arms, and now it was strong upon him. She was very near, and there was a drooping weariness in her attitude which seemed to demand protection. "I have a queer feeling that something awful is going to happen to-night, Monty," she answered, trouble in her soft voice. "You're nervous, that's all," he said, "and you should get to sleep. Good-night." Their hands touched in the darkness, and the thrill that went over him told a truth of which he had been only vaguely conscious. The power of it made him exultant. Yet when he thought of her and her too quiet affection for him it left him despondent. Something bumped against the side of the ship and a grating sound followed. Then came other gentle thuds combined with the soft swish of water disturbed. Peggy and Brewster were on the point of going below when their attention was caught by these strange sounds. "What is it?" she asked as they paused irresolutely. He strode to the rail, the girl following close behind him. Three sharp little whistles came from above and behind them, but before they had time even to speculate as to their meaning the result was in evidence. Over the sides of the ship came shadowy forms as if by magic; at their backs panther-like bodies dropped to the deck with stealthy thuds, as if coming from the inky sky above. There was an instant of dreadful calm and then the crisis. A dozen sinewy forms hurled themselves upon Brewster, who, taken completely by surprise, was thrown to the deck in an instant, his attempt to cry out for help being checked by heavy hands. Peggy's scream was cut off quickly, and paralyzed by terror, she felt herself engulfed in strong arms and smothered into silence. It all happened so quickly that there was no chance to give the alarm, no opportunity to resist.