But the lunch was tempting, and finally its discussion called them away even from that of the shark. And then they all sailed homeward over the green and blue water, while the white sand hills shone silvery before them, and then turned red in the sunset. That night the moon was at its full. Keith went out and strolled up and down on the beach. Carrington was playing fox-and-goose with Mme. Gonsalvez on a board he had good-naturedly constructed for her entertainment when she confessed one day to a youthful fondness for that exciting game. Up stairs gleamed the little Sister's light. "Saying her prayers with her lips, but thinking all the time of that old convent," said the stroller to himself, half scornfully. And he said the truth. The sea was still and radiant; hardly more than a ripple broke at his feet; the tide was out, and the broad beach silvery and fresh. "At home they are buried in snow," he thought, "and the wind, is whistling around their double windows." And then he stretched himself on the sand, and lay looking upward into the deep blue of the night, bathed in the moonlight, and listening dreamily to the soft sound of the water as it returned slowly, slowly back from the African coast. He thought many thoughts, and deep ones too, for his mind was of a high order; and at last he was so far away on ideal heights that, coming home after midnight, it was no wonder if, half unconsciously, he felt himself above the others; especially when he passed the little Sister's closed door, and thought, smiling not unkindly, how simple she was. The next morning the two men went off in their boat again for the day, this time alone. There were still a few more questions to settle about that shark, and, to tell the truth, they both liked a good day of unencumbered sailing better than anything else. About four o'clock in the afternoon Melvyna, happening to look out of the door, saw a cloud no bigger than a man's hand low down on the horizon line of the sea. Something made her stand and watch it for a few moments. Then, "Miss Luke! Miss Luke! Miss Luke! Miss Luke!" she called quickly. Down came the little Sister, startled at the cry, her lace work still in her hand. "Look!" said Melvyna. The Sister looked, and this is what she saw: a line white as milk coming toward them on the water, and behind it a blackness. "What is it?" she asked. "A tornader," said Melvyna with white lips. "I've only seen one, and then I was over in the town; but it's awful! We must run back to the thicket," Seizing her companion's arm, the strong Northern woman hurried her across the sand, through the belt of sand hills, and into the thicket, where they crouched on its far side close down under the protecting backbone. "The bushes will break the sand, and the ridge will keep us from being buried in it," she said. "I dursn't stay on the shore, for the water'll rise."