Shepard, swimming rather easily, regarded him thoughtfully.
"While we talk to each other in this more or less polite manner, Mr. Kenton," he said, "we must not forget that we're in deadly earnest. I mean to take you, and our scouts mean to take every other messenger who goes out from Colonel Sherburne's camp. You know, and I know, that if the Army of Northern Virginia does not reach in a few days that camp, where there is a ford in ordinary weather, it will be driven up against the Potomac and we can accumulate such great forces against it that it cannot possibly escape. Even at Sherburne's place its escape is more than doubtful, if it has to linger long."
"Yes, I know these things quite well, Mr. Shepard. I know also, as you do, that General Meade's army is not in direct pursuit, and, that in a flanking movement, he is advancing across South Mountain and toward Sharpsburg. It is a march well calculated and extremely dangerous to General Lee, if he does not hear of it in time. But he will hear of it soon enough. A comrade of mine, George Dalton, will tell him. Others from Colonel Sherburne's camp will tell him, and I mean to tell him too. I hope to be the first to do so."
Harry never deceived himself for a moment. He knew that although Shepard liked him, he would go to the uttermost to stop him, and as for himself, while he had a friendly feeling for the spy, he meant to use every weapon he could against him. Realizing that he could not linger much longer, as the chill of the water was already entering his body, he swam closer to Shepard, still staring directly into his eyes. How thankful he was now for those innumerable swimmings in the little river that ran near Pendleton! Everything learned well justifies itself some day.
Although there was but little moonlight they were so close together that they could see the eyes of each other clearly, and Harry detected a trace of uneasiness in those of Shepard. A good swimmer, the water nevertheless was not his element, and although a man of great physique and extraordinary powers, he longed for the solid earth under his feet.
Harry drew himself together as if he were going to dive, but instead of doing so suddenly raised himself in the water and shot forth his clenched tight fist with all his might. Shepard was taken completely by surprise and he sank back under the water, leaving a blood stain on its surface. Harry watched anxiously, but Shepard came up again in a moment or two, gasping and swimming wildly. The point of his jaw was presented fairly and Harry struck again as hard as he could in the water. Shepard with a choked cry went under and Harry, diving forward, seized his body, bringing it to the surface.
Shepard was senseless, but getting an arm under his shoulders Harry was able to swim with him to the northern shore, although it took nearly all his strength. Then he dragged him out upon the bank, and sank down, panting, beside him.
The great Civil War in America, the greatest of all wars until nearly all the nations of Europe joined in a common slaughter, was a humane war compared with other wars approaching it in magnitude. It did not occur to Harry to let Shepard drown, nor did he leave him senseless on the bank. As soon as his own strength returned he dragged him into a half-sitting position, and rubbed the palms of his hands. The spy opened his eyes.
"Good-by, Mr. Shepard," said Harry. "I'm bound to leave before you recover fully because then I wouldn't be your match. I'm sorry I had to hit you so hard, but there was nothing else to do."
"I don't blame you. It was man against man."