Two blows were sufficient to make the "Portsmouth lawyer" quit his grip. The plug had apparently only been adjusted that day, and had indeed never been properly driven home. But Wat was not content with this. He seized the axe which he found on board, and drove it vigorously through the planking of the sides, low down below the water-line, till the salt-water came bubbling up. Then he hauled in the rope by which the boat was attached to the lighter skiff in which Kate and Scarlett sat. As the prow of the scuttled boat touched the stern of the other, Wat stepped on board with the hatchet in his hand. Then with a sharply trenchant "chip" he severed the tow-rope, and the doomed boat instantly fell away towards the white line of the breakers which they had so perilously skirted. CHAPTER XXXVI PASSAGE PERILOUS "Now let us get out of this," said Scarlett, who had grown palpably uneasy. "One cooling experience of the Suck of Suliscanna is enough for me." Their smaller boat came about just in time. They could see the derelict snatched like a feather and whirled away by the rush of imperious water. The noise of the roaring of the Suck became almost deafening. To seaward they still caught glimpses of their late consort, rolling this way and that amid numberless jets and hillocks of sparkling and phosphorescent water. Now she ascended with a dancing motion. Anon the fountains of the deep boiled and hissed and curled over her as she lumbered on to her doom. Then as she gradually took in water she lurched more and more heavily, till at last they saw her stern stand black against the sky, for a moment shutting out the stars, as she filled and sank. "Handsomely done! Now straight for the entrance of the water-cave, and ho for the isle of Fiara!" cried Wat, who began with every stroke to feel himself drawing clear of the multiplied dangers of the night. Yet the most difficult part of the passage was still to come. All the while Kate sat silent and watchful in the stern. Wat and Scarlett were at the oars. Scarlett used the unconscious Jan for an excellent stretcher as he laid himself to his work. So strong was the north current even there that they had to pull hard for a moment or two lest they should be carried past the goë which formed the entrance to the water-cavern through which they must pass to their city of refuge. "There!" at last cried Wat, indicating the dark break in the cliff-line with a certain pride, as they came almost level with the mouth of the passage, and saw vast sombre walls rising solemnly on either side of that black lane of sea-water, sown with phosphorescent sparks, which stretched before them. Presently they were shut within, as it had been by the turning of a wrist. The stars went out above. The waters slept. The air was still as in a chamber. The soughing roar of the Suck of Suliscanna died down to a whisper and then was heard no more.