"Jump!" yelled the man, and, as he shouted, the girl disappeared over- side, perilously near the sheet. He knew the danger of coming up under a wet sail, and, diving from the high side, he swam with racing strokes toward the point where she had gone down. When Adrienne's head did not reappear, his alarm grew, and he plunged under water where the shadow of the overturned boat made everything cloudy and obscure to his wide- open eyes. He stroked his way back and forth through the purple fog that he found down there, until his lungs seemed on the point of bursting. Then, he paused at the surface, shaking the water from his face, and gazing anxiously about. The dark head was not visible, and once more, with a fury of growing terror, he plunged downward, and began searching the shadows. This time, he remained until his chest was aching with an absolute torture. If she had swallowed water under that canvas barrier this attempt would be the last that could avail. Then, just as it seemed that he was spending the last fraction of the last ounce of endurance, his aching eyes made out a vague shape, also swimming, and his hand touched another hand. She was safe, and together they came out of the opaqueness into water as translucent as sapphires, and rose to the surface. "Where were you?" she inquired. "I was looking for you--under the sail," he panted. Adrienne laughed. "I'm quite all right," she assured him. "I came up under the boat at first, but I got out easily enough, and went back to look for you." They swam together to the capsized hull, and the girl thrust up one strong, slender hand to the stem, while with the other she wiped the water from her smiling eyes. The man also laid hold on the support, and hung there, filling his cramped lungs. Then, for just an instant, his hand closed over hers. "There's my hand on it, Drennie," he said. "We start back to New York to-morrow, don't we? Well, when I get there, I put on overalls, and go to work. When I propose next, I'll have something to show." A motor-boat had seen their plight, and was racing madly to their rescue, with a yard-high swirl of water thrown up from its nose and a fusillade of explosions trailing in its wake. * * * * *