They believed that Lee was merely extending his lines, but an hour before noon a battery opened fire from a hill upon the marching Confederate column. Harry and Dalton heard shrapnel whizzing over their heads. After the first involuntary shiver they regained the calm of youthful veterans and rode on in silence. But the fire of the Northern artillery was damaging, even at great range. Shells and shrapnel sprayed showers of steel over the column. Men were killed and others wounded. As they could not turn back to fight those troublesome cannon, the column turned farther away and forced a road through a new path. It seemed now that Jackson's march was discovered and that the whole Northern army might press in between him and Lee. Harry's heart rose in his throat and he looked at his general. But Jackson rode calmly on. The curiosity of the Union generals in regard to that marching column increased. Several of them appealed to Hooker to let them advance in force and see what it was. Sickles was allowed to go out with a strong division, but instead of reaching Jackson he was confronted by a portion of Lee's force, thrown forward to meet him, and the battle was so fierce that Sickles was compelled to send for help. A formidable force came and drove the Southern division before it, but the vigilant Jackson, informed by his scouts of what was happening behind him, turned his rear guard to meet the attack, and Sickles was driven off a second time with great loss. Then Jackson's men quickly rejoined him and they continued their march, the vanguard, in fact, never having stopped. Harry took no part in this, but from a distance he saw much of it. Once more he admired the surpassing alertness and vigor of Jackson, who never seemed to make a mistake, a man who was able while on a great march to detach men for the help of his chief, while never ceasing to pursue his main object. The Northern forces, although they had fought bravely, retreated, and the great movement that was going on remained hidden from them. The gap between Lee and Jackson was growing wider, but they did not know it was there. Hooker's retreat with his great army into the Wilderness had given his enemies a chance to befog and bewilder him. Harry's supreme confidence returned. All things seemed possible to his chief, and once more they were marching, unimpeded. It was now much past noon, and they turned into a new road, leading north through the thickets. "It scarcely seems possible that we can pass around a great army in this way," said Dalton; "but, Harry, I'm beginning to believe the general will do it." "Of course he will," said Harry. "It's Old Jack's chief pleasure to do impossible things. He leaves the possible to ordinary men. See him. He didn't even stop to look back while our rear guard returned to help drive off the Yankees."