Stonewall Jackson, sitting stiffly, looked at the other standing, tense, energetic, before him. Something stole into his face that without being a smile was like a smile. It gave a strange effect of mildness, tenderness. It was gone almost as soon as it had come, but it had been there. "I can understand your feeling, sir," he said. "A battle is imminent. Until it is over you are restored to your command."

The detachment of the Army of Northern Virginia going against Harper's Ferry crossed the Chesapeake and Ohio Canal at Williamsport and forded the Potomac a few hundred yards below the ferry. A. P. Hill, McLaws, Walker, Jackson's own, the long column overpassed the silver reaches, from the willows and sycamores of the Maryland shore to the tall and dreamy woods against the Virginia sky. "We know this place," said the old Army of the Valley. "Dam No. 5's just above there!" Regiment by regiment, as it dipped into the water, the column broke into song. "Carry me back to Old Virginny!" sang the soldiers.

At Martinsburg were thirty-five hundred blue troops. Stonewall Jackson sent A. P. Hill down by the turnpike; he himself made a détour and came upon the town from the west. The thirty-five hundred blue troops could retire southward, a thing hardly to their liking, or they could hasten eastward and throw themselves into Harper's Ferry. As was anticipated, they chose the latter course.

Stonewall Jackson entered Martinsburg amid acclaim. Here he rested his troops a few hours, then in the afternoon swung eastward and bivouacked upon the Opequon. "At early dawn," he marched again. Ahead rode his cavalry, and they kept the roads on two sides of Harper's Ferry. A dispatch came from General Lafayette McLaws. General Jackson:—After some fighting I have got the Maryland Heights. Loudoun Heights in possession of General Walker. Enemy cut off north and east.

"Good! good!" said Jackson. "North, east, south, and west."

On the Maryland side of the Potomac, some miles to the north of Harper's Ferry, Lee likewise received a report—brought in haste by a courier of Stuart's. General:—The enemy seems to have waked up. McClellan reported moving toward South Mountain with some rapidity. I am holding Crampton and Turner's Gaps. What are my orders?

Lee looked eastward toward South Mountain and southward to Harper's Ferry. "General McClellan can only be guessing. We must gain time for General Jackson at Harper's Ferry." He sent word to Stuart. "D. H. Hill's division returning to South Mountain General Longstreet ordered back from Hagerstown. We must gain time for General Jackson. Hold the gaps."

D. H. Hill and Stuart held them. High above the valleys ran the roads—and all the slopes were boulder-strewn, crested moreover by broken stone walls. Hooker and Reno with the First and Ninth corps attacked Turner's Gap, Franklin's corps attacked Crampton's Gap. High above the country side, bloody and determined, eight thousand against thirty thousand, raged the battle.

Stonewall Jackson, closely investing Harper's Ferry, posting his batteries on both sides of the river, on the Maryland Heights and Loudoun Heights, heard the firing to the northward. He knit his brows. He knew that McClellan had occupied Frederick, but he knew nothing of the copy of an order found wrapped around three cigars. "What do you think of it, general?" ventured one of his brigadiers.

"I think, sir, it may be a cavalry engagement. Pleasanton came into touch with General Stuart and the Horse Artillery."