At this moment the sails of the large yacht shook, as her head came up to the wind. But the next instant she fell off, heeled over, and drove ahead again. Bobtail distinctly heard a shout from her, though she was a mile distant. He watched her with his heart in his mouth, and his worst fears were realized when he saw her lift her bow high up in the water. She had run upon the ledge.

"By gracious! she is on the rocks!" cried Bobtail, wild with excitement and anxiety.

"So she is!" gasped Monkey.

Then came a shriek in the tones of a woman's voice, whose piercing note was heard above the roaring of the billows.

"That's Mrs. Montague," said Bobtail. "Get your warp-line out, Monkey. We have got something to do to-night."

The Skylark flew on her mission of rescue, and her skipper watched the Penobscot with intense interest. Her bow rose and fell at every sea, and it was evident that she was crashing her timbers at every motion. In five minutes from the time she struck, the smaller yacht came up with her. She had gone upon the last ledge of the series that extends to the southward from Islesboro'. Bobtail ran to the west of the ledges, and, going entirely round to avoid gybing, he came up into the wind close under the stern of the Penobscot. He heard her planks and timbers grinding on the rocks. Monkey heaved the warp-line, which was caught by the sailors on board of the wreck. The mainsail of the Skylark was lowered.

By this time, though the waves still beat over the bow of the Penobscot, she ceased to grind upon the rocks. The tide was going out, and less of the weight of the vessel was supported by the water, and as the volume of the waves diminished, their power lessened. In two or three hours the yacht would be high and dry. She had gone upon the ledge in a direction diagonal with the wind, so that under one of her quarters the water was comparatively smooth. Bobtail and Monkey heaved on the warp-line till they brought the Skylark alongside this lee quarter.

"No time to lose, sir!" shouted Bobtail to Colonel Montague, who was supporting his wife and daughter on deck, for the cabin was flooded with water. "I shall be aground in half an hour."

"Can your boat weather this blow?" asked the colonel, anxiously.

"Yes, sir; she can stand anything that any boat can."