Northern cavalry, on the other side of the river, had heard the heavy firing and they could not understand it. Could their forces following Lee on the right bank be engaged in battle with him? They had not heard of any such advance by their own men, yet they plainly heard the sounds of a heavy cannonade, and it was a matter into which they must look. They had disregarded sharp firing too often before and they were growing wary. But with that wariness also came a daring which the Union leaders in the east had not usually shown hitherto. They had a strong cavalry force in three divisions on the other side of the river, and the commanders of the divisions, Buford, Gregg and Duffie, with Pleasanton over all, were forming a bold design. Events were to move fast for Harry, much faster than he was expecting. He was sent that night with a note to Stuart, who went into camp with his ten thousand cavalry and thirty guns on a bare eminence called Fleetwood Hill. The base of the hill was surrounded by forest, and not far away was a little place called Brandy Station. Harry was not to return until morning, as he had been sent late with the message, and after delivering it to Stuart he hunted up his friend Sherburne. He found the captain sitting by a low campfire and he was made welcome. Sherburne, after the parade and sham battle, had cleaned the dust from his uniform and he was now as neat and trim as St. Clair himself. "Sit down, Harry," he said with the greatest geniality. "Here, orderly, take his horse, but leave him his blankets. You'll need the blankets to-night, Harry, because you bunk with us in the Inn of the Greenwood Tree. We've got a special tree, too. See it there, the oak with the great branches." "I'll never ask anything better in summer time, provided it doesn't rain," said Harry. "Wasn't that a fine parade?" Sherburne ran on. "And this is the greatest cavalry force that we've had during the war. Why, Stuart can go anywhere and do anything with it. A lot of Virginia scouts under Jones are watching the fords, and we've got with us such leaders as Fitz Lee, Robertson, Hampton and the commander-in-chief's son, W. H. F. Lee--why should a man be burdened with three initials? We can take care of any cavalry force that the Yankees may send against us." "I've noticed in the recent fighting," said Harry, "that the Northern cavalrymen are a lot better than they used to be. Most of us were born in the saddle, but they had to learn to ride. They'll give us a tough fight now whenever we meet 'em." "I agree with you," said Sherburne, "but they can't beat us. You can ride back in the morning, Harry, and report to the commander-in-chief that he alone can move us from this position. Listen to that stamping of hoofs! Among ten thousand horses a lot are likely to be restless; and look there at the hilltop where thirty good guns are ready to turn their mouths on any foe."