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."
"The water was in my favor. I'm bound to admit that on land you'd have won."
"At any rate I thank you for dragging me out of the river."
"You'd have done as much for me."
"So I would, but our personal debts of gratitude can't be allowed to interfere with our military duty."
"I know it. Therefore I take a running start. Good-by."
"We'll meet again."
"But not on this side of the Potomac. It may happen when the Army of Northern Virginia and the Army of the Potomac go into battle on the other side of the river."
Harry darted into the forest, and ran for a half-hour. He meant to put as much distance as possible between Shepard and himself before the latter's full strength returned. He knew that Shepard would follow, if he could, but it was not possible to trail one who had a long start through dark and wet woods.
He came through the forest and into a meadow surrounded by a rail fence, on which he sat until his breath came back again. He had forgotten all about his wet uniform, but the run was really beneficial to him as it sent the blood leaping through his veins and warmed his body.
"So far have I come," said Harry, "but the omens promise a hard march."
He had his course fixed very clearly, and a veteran now in experience, he could guide himself easily by the moon and stars. The clouds were clearing away and a warm wind promised him dry clothing, soon. Long afterward he thought it a strange coincidence that his cousin, Dick Mason, in the far South should have been engaged upon an errand very similar in nature, but different in incident.
He crossed the meadow, entered an orchard and then came to a narrow road. The presence of the orchard indicated the proximity of a farmhouse, and it occurred to Harry that he might buy a horse there. The farmer was likely to be hostile, but risks must be taken. He drew his pistols. He knew that neither could be fired after the thorough wetting in the river, but the farmer would not know that. He saw the house presently, a comfortable two-story frame building, standing among fine shade trees. Without hesitation he knocked heavily on the door with the butt of a pistol.
He was so anxious to hasten that his blows would have aroused the best sleeper who ever slept, and the door was quickly opened by an elderly man, not yet fully awake.
"I want to buy a horse."
"Buy a horse? At this time of the night?"
He was about to slam the door, but Harry put his foot over the sill and the muzzle of his pistol within six inches of the man's nose.
"I want to buy a horse," he repeated, "and you want to sell one to me. I think you realize that fact, don't you?"
"Yes, I do," replied the man, looking down the muzzle of the big horse pistol.
"Come outside and close the door behind you. I know you haven't on many clothes, but the night's warm, and you need fresh air."
The man with the muzzle of the pistol still near his nose, obeyed. But as he looked at the weapon he also had a comprehensive view of the one who held it.
"Wet ain't you?" he said.
"Do you think it necessary to put it in the form of a question?"
"I don't like to say, unless I'm shore."
"Where do you keep your horses?"
"In the barn here to the left. What kind of a horse did you think you'd keer fur most, stranger?"
"The biggest, the strongest and fastest you've got"
"I thought mebbe you'd want one with wings, you 'pear to be in such a pow'ful hurry. I wish you wouldn't keep that pistol so near to my nose. 'Sides, you've gethered so much mud an' water 'bout you that you ain't so very purty to look at!"