The orca was by no means hungry so soon after the feast which she had made on the giant ray, but the succulent morsel of the squid was a temptation not to be resisted. Tipping smoothly, her huge but finely modelled black-and-white form shot straight downward through the shimmering flood. But before she could reach him, the squid looked up and saw her. On the instant his ten loose tentacles tightened to a rigid bundle which offered no obstruction to his progress; his pale sides contracted with a mighty convulsion, expelling a volume of water which shot him along with the speed of a torpedo from its tube; and at the same time, from a gland within the propulsion sac, he squirted forth a jet of inky fluid which spread at once into a great cloud of black, veiling his flight. Behind that concealment he changed his direction, and fled downward toward a deep crevice in the rocky bottom, where he knew that the jaws of his enemy would not be able to reach him.

The orca, undeterred, plunged straight onward into the inky cloud. But once well within that gloom she lost all track of her intended prey. She also, for the moment, lost herself. This way and that she darted, snapping her vast jaws ravenously, but in vain. They closed on nothing but the empty and tainted water. At last, and quite unexpectedly, she emerged from the blackness into the transparent green, and, glancing upward, saw a sight which caused her to hurl herself madly to the surface with a Titanic sweep of her great flanks. That furious stroke made the depths boil like the thrust of a liner’s propellers.

The calf, having started to follow its mother into the depths, had been frightened by that inky cloud into which it had seen her vanish. Returning in a flurry to the surface, it was swimming around aimlessly and anxiously, when it caught the eye of a wandering shark.

The shark, knowing very well what it was, looked around for the mother. He had no desire to be uncivil to a mother orca; but there was no mother in sight. He did not understand it; but he was ragingly hungry, and such an opportunity was quite irresistible. He rose at the calf with a rush, and turned over on his side, exposing his livid-white belly, to seize the prize. The calf, appalled at the black, triangular, many-toothed cavern which gaped so suddenly before it, writhed away just in time, and began swimming in a big circle around the spot where its mother had dived.

Again the shark rushed; but he had to turn on his side to bring his curious underset jaws into play, and the calf of the orca had already the nimbleness of its tribe. Again the attack failed. Before he could repeat it, he caught sight of the mother shooting up from the green depths. Though he was some twenty-five feet in length—a good five feet longer than the orca—he turned and fled for his life.

One glance assured the mother that her little one was unhurt. Then she darted after the aggressor at a pace which made his flight quite futile. He had not gone fifty yards when she was upon him, open-jawed. Hurling himself convulsively aside, he just succeeded in evading that first resistless charge. With the courage of desperation he twisted himself about, turned half over, glided beneath his adversary’s belly, and caught at her with his triangular jaws. But she had already swerved, and he failed to get a fair hold. He did, indeed, rend out a mass of hide and blubber, but he reached no vital point, and the raging killer hardly felt the wound. Whirling with a violence that sent the foam and spray spurting into the air, she caught the base of the shark’s tail between her immense jaws.

As far as anything like a fight was concerned, this was the end of it. For several minutes the gigantic struggle went on, dashing the discolored water yards high; but it was all on one side, as the orca shook and crushed and tore the life out of her beaten opponent. At last she drew off, leaving a mangled mass to sink slowly into the depths. Then, having snuggled the excited calf under her fin, and given him to nurse, she swam slowly inland toward the deep channel which here ran between the islands and the shore, where she thought she might find some more of those succulent squid to compensate her for the one which had so inconsiderately evaded her approaches.

The breeze, which hitherto had been little but a succession of cat’s-paws, now settled into a steady draft, though not strong enough to do more than darken the surface of the sea to a heavy purple. Running free before it, up along the coast, between the cliffs and the islands, came a small cat-boat, its one sail sparkling white in the clear sunshine.

The tiny craft contained two passengers—the man at the helm, smoking a big brier pipe, and a silky brown retriever curled up at the foot of the mast. It was a stern coast and a dangerous water for such a cockle-shell to traverse; but the man was a good amateur navigator of small craft, and he knew that, between the port which he had left, some fifteen miles back down the coast, and the harbor which he was making for, a dozen miles to the north, there were plenty of refuges wherein he could take shelter in case a sudden storm should blow up out of the east. These waters were unfamiliar to him, but he had a good chart; and this was his special delight—the coasting of unknown shores, with no companionship but that of his faithful and accommodating dog, who always agreed with him as to the most interesting places to visit.

But though Gardner was an expert yachtsman, with an eye wise to all signs of the weather, and an instinct that could feel the pulse of the wind through tiller or taut sheet, he knew something less of natural history than was desirable for one who made his playground on the peopled seas. His notions of all the whale tribe and their varying characters were based on what he had read of the great timorous whalebone whale, and what he had seen of the merry and harmless porpoise. When, therefore, he caught sight of the arched black back and formidable head of the orca, lazily ploughing the swells, it never occurred to him that now was the time for discretion. Had he been an habitué of these waters, he would have turned his prow promptly in another direction, lest the orca should think he wanted to intrude upon her privacy. As it was, however, he sailed nearer, to see what manner of fish or beast it might be, this black-and-white creature that treated his approach with such indifference.