Had the turtle had cunning to match his courage, the lordship of the glass house might have changed holders in that fight. Had he fixed his unbreakable grip in the head of his foe, just above the beak, he would have conquered in the end. But as it was, he had now a vulnerable point, and at last the octopus found it. His beak closed upon the exposed half of the turtle's head, and slowly, inexorably, sheared it clean off just behind the eyes. The stump shrank instantly back into the shell; and the shell became again the unresisting plaything of the tentacles, which presently, as if realizing that it had no more power to retaliate, flung it aside. In a few minutes the silt settled. Then the eager faces beyond the glass saw the lord of the tank crouching motionless before his lair, his ink-like eyes as impassive and implacable as ever, while the turtle lay bottom side up against the glass, no more to be taken account of than a stone. BACK TO THE WATER WORLD BACK TO THE WATER WORLD CHAPTER I An iron coast, bleak, black, and desolate, without harborage for so much as a catboat for leagues to north or south. A coast so pitiless, so lashed forever by the long, sullen rollers of the North Atlantic, so tormented by the shifting and treacherous currents of the tide between its chains of outlying rocky islets, that no ship ever ventured willingly within miles of its uncompromising menace. A coast so little favored by summer that even in glowing August the sun could reach it seldom through its cold and drenching fogs. Perhaps half a mile off shore lay the islands--some of them, indeed, mere ledges, deathtraps for ships, invisible except at low tide, but others naked hills of upthrust rock, which the highest tides and wildest hurricanes could not overwhelm. Even on the loftiest of them there was neither grass, bush, nor tree to break the jagged outlines, but day and night, summer and winter long, the sea-birds clamored over them, and brooded by the myriad on their upper ledges. These islands were fretted, on both their landward and their seaward sides, by innumerable caves. In one of these caves, above the reach of the highest tide, and facing landward, so that even in the wildest storms no waves could invade it, the pup of the seal first opened his mild eyes upon the misty northern daylight.