The "Heron" was a faster sailer than the "Wild Cat," and soon left her far behind; as they were both bound for Fremantle this did not matter. The "Heron" was to put in at Shark's Bay, to land the two divers, and this would give the other schooner time to get on terms with her. Kylis had had no opportunity of attempting to steal any of the pearls so far, and they were nearing Shark's Bay. If he was to succeed there was no time to be lost. The black pearl was his object, but the difficulties to be overcome in endeavouring to secure it were almost unsurmountable. Jack Redland always carried it with him, and slept with his belt on; he was, moreover, a match for such a man as Kylis, being strong and active. In his cabin the whole of the pearls were kept securely locked up, and as Kylis had no excuse for being in that part of the schooner suspicion would at once be aroused if he was seen there. Now that the chief part of their work was over there was a certain amount of laxity and freedom on board. The crew were allowed more liberty, although Phil Danks took care the schooner should be thoroughly looked after. Jacob Rank was on board, and this relieved Phil from some responsibility, as he was as good a sailor as himself. Jacob often took charge while Phil rested, and this arrangement suited both, as the former did not care to be always idle. In consequence of this free and easy style of managing the "Heron," Kylis and Miah had very little difficulty in roaming about where they liked, although if they ventured near Jack Redland's cabin, and Jacob caught sight of them, they had to beat a speedy retreat. Kylis knew the coast well, and saw they would be in Shark's Bay with a fair wind in another four-and-twenty hours. He became desperate, and without telling Miah of his purpose, determined to try and get the black pearl that night. He was a swimmer of great endurance, and could remain in the water for hours, covering long distances. He knew that about midnight, or shortly after, the "Heron" would pass a spot called Swan Point, and that she would not be more than four or five miles distant from it. Swan Point was a peculiar shaped rock, standing in solitary grandeur, about two miles from the shore, with a deep channel between. Sometimes vessels passed through the channel, but only in daylight. Kylis thought out his plan cleverly. If successful in his attempt, he could slip overboard, swim to Swan Point, remain there and rest, and then swim to the shore. There were sharks about, but he had his knife, and had come off best in a tussle with one of these monsters. If he failed he could still jump overboard, and escape.