“Meanwhile, here we are at the Rapidan,” said the practical Warner, “and beyond it is our army. Look at that long line of fires, boys. Aren't they cheering? A fine big army like ours ought to beat off anything. We almost held our own with Jackson himself at Cedar Run, and he had two to one.” “We will win! We're bound to win!” said Dick, with sudden access of hope. “We'll crush Lee and Jackson, and next summer you and I, George, will be out on the western plains with Frank, watching the buffalo millions go thundering by!” They forded the Rapidan and rejoined their regiment with nothing to tell. But it was cheerful about the fires. Optimism reigned once more in the Army of Virginia. McClellan had sent word to Pope that he would have plenty of soldiers to face the attack that now seemed to be threatened by the South. Brigades from the Army of the Potomac would make the Army of Virginia invincible. Dick having nothing particular to do, sat late with his comrades before one of the finest of the fires, and he read only cheerful omens in the flames. It was a beautiful night. The moon seemed large and near, and the sky was full of dancing stars. In the clear night Dick saw the black bulk of Clark's Mountain off there against the horizon, but he could not see what was behind it. CHAPTER III. BESIDE THE RIVER Dick was on duty early in the morning when he saw a horseman coming at a gallop toward the Rapidan. The man was in civilian clothing, but his figure seemed familiar. The boy raised his glasses, and he saw at once that it was Shepard. He saw, too, that he was urging his horse to its utmost speed. The boy's heart suddenly began to throb, and there was a cold, prickling sensation at the roots of his hair. Shepard had made an extraordinary impression upon him and he did not believe that the man would be coming at such a pace unless he came with great news. He saw Shepard stop, give the pass word to the pickets, then gallop on, ford the river and come straight toward the heart of the army. Dick ran forward and met him. “What is it?” he cried. “General Pope's tent! Where it is! I can't wait a minute.” Dick pointed toward a big marquee, standing in an open space, and Shepard leaping from his horse and abandoning it entirely, ran toward the marquee. A word or two to the sentinels, and he disappeared inside. Dick, devoured with curiosity and anxiety, went to Colonel Winchester with the story of what he had seen. “I know of Shepard,” said the colonel. “He is the best and most daring spy in the whole service of the North. I think you're right in inferring that he rides so fast for good cause.”