"I don't think she is; but if she does get any nearer to us, I shall give her the slip. The Snapper is going into Mobile Bay as sure as you live. You can bet your life on it," insisted the captain.

Christy was not disposed to converse on the subject, and he began to wonder in what manner the Snapper could give her pursuer the slip. The former was the smaller vessel, and probably did not draw over fourteen feet of water, if she did more than twelve. It might be possible for her to run into shoal water where the pursuer could not follow her.

After the dinner table was cleared off, the captain seated himself at it with a chart spread out before him. It was plain enough that he was devising some expedient to escape the three-master. Christy did not deem it prudent to observe him, and he went on deck. It was as clear as the daylight that the pursuer was gaining rapidly upon the Snapper; and the prisoner did not believe that the latter was making over twelve knots.

By this time seven hours had elapsed since the distant sail had come in sight, and she was now near enough for the prisoner to be sure that she was the Chateaugay. She could make sixteen knots when driven at her best, and she must be gaining four or five knots an hour on the chase. Christy had been through this channel in the Bellevite, and he discovered that the steamer was running near the shoal water. Presently the captain came on deck, and he appeared to be less nervous than before, perhaps because he had arranged his plan to escape his pursuer.

Within an hour Christy recognized the East Isaac, a rock rising ten or twelve feet above the surface of the water, which he identified by its nearness to one over which the sea was breaking. The captain was too much occupied in the study of the surroundings to take any notice of him, and he endeavored to keep out of his sight.

The prisoner consulted his watch, and found it was four o'clock. The tower of the Great Isaac light could just be made out. The Chateaugay was not more than four miles astern of the Snapper, and in another hour she would certainly come up with her, if Captain Flanger did not put his plan into execution. The course of the chase continued to bring her nearer to the reefs.

"Ring one bell!" shouted the captain to the quartermaster at the wheel.

The effect of one bell was to reduce the speed of the Snapper by one-half. The order to put the helm hard a starboard followed in a short time. The course was made about south, and the steamer went ahead slowly. Two men in the chains were heaving the lead constantly. They were reporting four and five fathoms. After the vessel had gone five or six miles on this course, it was changed to about south-west. She was then moving in a direction directly opposite to that of the Chateaugay, and the anxious prisoner could see the man-of-war across the reefs which lifted their heads above the water, very nearly abreast of the Snapper, though at least ten miles distant from her.

"Do you know what steamer that is, Mr. Passford?" asked Captain Flanger, coming aft, apparently for the purpose of finding him.

"How should I know, Captain?" asked Christy.