"Why do you suppose," asked Mr Durocher, "that the stranger is in pursuit of you?" "Because," replied Captain Johnson, "when we first saw him, the course which he was steering was due south-east as ours is north-east, and he is now directly astern of us. If Miss Durocher will come with me upon deck, she can see our pursuer very plainly by aid of the telescope. You are too weak, I suppose, to get upon deck yourself, Mr Durocher?" "I will try to do so, if you will give me your aid," answered the invalid. "You had better not undertake so much," said Louise. "I am afraid that the fatigue will do you harm." "It will not hurt him at all, miss," said Captain Johnson, cheerily. "He need not suffer from fatigue at all. If you will let that yellow girl of yours bring up an easy-chair, I will carry your father up in my arms." Captain Johnson was, indeed, a powerfully-made man; he was fully six feet in height, and stout in proportion. Constant exercise in the open air had given to him the full vigour to which his herculean frame seemed to entitle him. As soon as the invalid was made comfortable in his easy-chair, and was in a position from which he commanded a view of the ocean all around, the spy-glass was handed to him. Far away towards the south-west, and at first sight rather low upon the horizon, the strange sail could be seen by the unassisted eye; but the telescope showed that her hull was above the horizon. "There seem to be a number of men upon her deck," said Mr Durocher; "and she has one of those long pivot-guns amidships. That is a very dangerous cannon, Captain Johnson; our pursuer may, with a gun of so long a range, do us ruinous injury without coming near enough to allow us to do him harm with our small cannon." The telescope was passed to the captain, and by him to Louise. It was then handed to the officers of the ship. "Can you make out her hull?" asked the captain of one of these officers, who had at the moment the glass in his hand. "Partly," was the answer. "What I can see of it is entirely black. She seems to be clipper-built." "And these Baltimore clippers are so fleet," remarked the captain. Things began to look dark for those on board the ship, it must be confessed; if the stranger's intentions were hostile, his superior speed, and the long range of his pivot-gun, made the escape of the chase very doubtful. Captain Johnson, however, like a good officer, made every preparation for defence. His self-possessed and even cheerful manner inspired those under his command with confidence. But Louise became very pale, and Mr Durocher suffered much in mind, principally upon her account; but, for the sake of each other, their fears were kept to themselves. The quadroon girl shivered with terror, on her own account, and on account of those to whom she had been so much attached for many years. STORY TWO, CHAPTER NINE. THE COMBAT.