His sudden exclamation was due to a shift of the wind, bringing back the fog again and covering the river, the town and the advancing Union army. The Confederate cannon then ceased firing, but Harry heard distinctly the sounds made by scores of thousands of men marching, that measured tread of countless feet, the beat of hoofs, the rumbling of cannon wheels over roads now frozen hard, and the music of many bands still playing. The thrill was all the keener when the great army became invisible in the fog, although the mighty hum and murmur of varied sounds proved that it was still marching there. Jackson was on the right of Lee's line. He would be, as usual, in the thick of it. His fighting line ran through deep woods, and he was protected, moreover, by the slope up which the Union troops would have to come, if they got near enough. Fourteen guns, guarded by two regiments, were on Prospect Hill at his extreme right, and on his left the ravine called Deep Run divided him from the command of Longstreet, which spread away toward Marye's Hill. Jackson's own line was a mile and a half long and he had thirty thousand men, while Longstreet and the others had fifty thousand more. Lee himself, directing the whole, rode along the lines on his white horse, and whenever the men saw him cheers rolled up and down. But Lee had little to say. All that needed to be said had been said already. Harry saw the great commander riding along that morning as calmly as if he were going to church. Lee, grave, imperturbable, was the last man to show emotion, but Harry thought once that he caught a gleam from the blue eye as he spoke a word or two with Jackson and went on. As he passed near them, Harry, Dalton and all the other young officers took off their hats, saluted and stood in silence. General Lee raised his own hat in return, and rode back toward the division of Longstreet. Harry glanced toward General Jackson, who was also mounted. But he did not move and the reins lay loose on the animal's neck. Once the horse dropped his head and nuzzled under some leaves for a few blades of sheltered grass that had escaped the winter. But the general took no notice. He kept his glasses to his eyes and watched every movement of the enemy, when the fog lifted enough for him to see. Presently he beckoned to Harry. "Ride over to General Stuart," he said, "and see if he has made any change in his lines. It is important that our formation be preserved intact and that no gaps be left."