They lashed three reefs down before they started, leaving only a small triangular strip of mainsail set, but that proved quite enough, and during the first few minutes Frank felt almost appalled as he glanced at the great gray combers that heaved themselves up astern. Most of them were hollow breasted, and their tops curled over, flinging up long wisps of foam and roaring ominously. As a rule they broke, divided, on either side of the boat, piling up in a snowy welter high about her shrouds, but now and then one seemed to break all over her and most of her deck was lost in a furious rush of water. Twice the canoe, which was too big to stow on deck, charged up and struck her with a resounding crash, and then broke adrift and disappeared. By degrees, however, Frank's uneasiness diminished. Somewhat to his astonishment, the light and buoyant craft stood the buffeting, and by the time dusk fell the seas were getting smaller. Still, they were big enough, and the boat appeared to be driving before them at an extraordinary speed. By eight o'clock in the evening they had shaken out one reef, and soon afterward Frank lay down in the cabin, because Jake said that he had no intention of entrusting either him or Harry with the helm, which was on the whole a relief to both of them. To run a small craft before a breaking sea in the dark is a very severe test of nerve, and it is, perhaps, worse when the combers still come foaming after her after the wind has somewhat fallen. In spite of the violent motion Frank managed to sleep until he was awakened some time after midnight by a shout from Jake. Crawling out, partly dazed, with his eyes half open, he saw that the sky had cleared and that a crescent moon was shining down. Then, close ahead of them, he saw the schooner. She was also running, for her stern was toward them, though for a moment or two it was hidden by the white top of a sea, and Frank could only make out the forward half of her sharply tilted deck. Her bowsprit and two torn jibs above it were high in the air, and her black boom-foresail all bunched up, with its gaff, which had swung down, jammed against the foremast shrouds. She carried no after canvas, and the reason became evident when, as her stern lurched up, Frank saw that her mainmast was broken off short. She sank down again while a comber foamed high about her rail, which was shattered on one quarter where the falling mast had struck, and a mass of canvas and tangled gear trailed in the sea beneath it. What struck the boy most, however, was the erratic manner in which she was progressing, for her bows swung up to windward every now and then until all her side was visible and she lumbered off at angle to her course and then came lurching back again. She was herringboning, as it is called at sea, in an extraordinary fashion, and she seemed low in the water. In the meanwhile the sloop was coming up with her fast and Jake stood up at the tiller to see more clearly.