"If you hit her," suggested Paul. "You can't very well help hitting her. Just squint along that gun, and see where the shot will bring up." Paul complied with this request, and took a long look over the great gun. "I should say that it was pointed a little too high," said he. "Perhaps it is; I have not fixed it just as I mean to have it. We will put in the charge before we do that," added Christy, who was now as self-possessed as though there was no excitement attending the operation he was arranging. "Do you know what steamer Captain Carbine will have?" asked Paul. "Not Carbine; Carboneer. No, I don't know what steamer he will have; only that she is an old one, and has a walking-beam," replied Christy. "That is rather indefinite, midshipman," added Paul, with a smile. "You can't always tell what a steamer is by looking at her, especially in the night; and a walking-beam is not a novelty on a steamer upon this river. You may send that shot through the wrong vessel; and if you should happen to kill a dozen or two of loyal citizens of the State of New York, they might be mean enough to hang you, or send you to the State prison for life for it. It won't do to fire off a shotted gun like that baby without knowing pretty well what you are shooting at." "That is a long argument, Paul; and I have not the remotest idea of doing any such thing as you describe. I am going to know what we are firing at before we pull the lock-string," replied Christy, rather impatiently. "But we have no time to dig up mare's nests. We will get up the ammunition and load this gun; then we will do the rest of the business." As ship-keeper and a member of the engineer's department for the last year, Sampson knew where everything was to be found. With all the usual precautions, the magazine was opened, and ammunition enough for three charges was conveyed to the deck, Warping having been called in to assist in the work. The gun was carefully loaded under the direction of Christy, who had been fully instructed and drilled in the duty. It was pointed as nearly as practicable to the point in the channel which the hostile steamer must pass, though the aim was to be rectified at the last moment. Paul went to his stateroom and took off his handsome uniform, replacing it with a suit of his working garments. Then he hastened to the engine, examined it, and satisfied himself that it was in good condition for the office which was soon to be required of it. He gave Sampson particular directions for his duty, and then went down the accommodation steps with the midshipman. "What are you going to do next, Christy?" asked Paul, for the young naval officer had been too busy with his preparations to develop his plan in full. "We will go ashore first, and I will take the Florence to the boat-house," replied Christy. "The next thing to be done is to make a reconnoissance down the river." "Why not go down in the Florence?" suggested Paul.