Then the Invincibles, curving a little to the right, were lost in the flame and smoke, and the pursuit, Jackson continually urging it, swept on. He seemed to Harry to be all fire. He shouted again and again. “We must follow them to the Potomac! To the Potomac! To the Potomac!” He sent his staff flying to every regimental commander with orders. He had the horses cut from the artillery and men mounted on them to continue the pursuit. He inquired continually for the cavalry. Harry, after returning from his second errand with orders, was sent on a third to Ashby. There was no time to write any letter. He was to tell him to come up with cavalry and attack the Federal rear with all his might. Harry found Ashby far away on the right, and with but fifty men. The rest had been scattered. He galloped back to his general and reported. He saw Jackson bite his lip in annoyance, but he said nothing. Harry remained by his side and the chase went on through the fields. Winchester was left out of sight behind, but the crashing of the rifles and the shouts of the troopers did not cease. The Northern army had not yet dissolved. Although many commands were shattered and others destroyed, the core of it remained, and, as it retreated, it never ceased to strike back. Harry saw why Jackson was so anxious to bring up his cavalry. A strong charge by them and the fighting half of the Northern force would be split asunder. Then nothing would be left but to sweep up the fragments. But Jackson's men had reached the limit of human endurance. They were not made of steel as their leader was, and the tremendous exultation of spirit that had kept them up through battle and pursuit began to die. Their strength, once its departure started, ebbed fast. Their knees crumpled under them and the weakest fell unwounded in the fields. The gaps between them and the Northern rear-guard widened, and gradually the flying army of Banks disappeared among the hills and woods. Banks, deeming himself lucky to have saved a part of his troops, did not stop until he reached Martinsburg, twenty-two miles north of Winchester. There he rested a while and resumed his flight, other flying detachments joining him as he went. He reached the Potomac at midnight with less than half of his army, and boats carried the wearied troops over the broad river behind which they found refuge. Most of the victors meanwhile lay asleep in the fields north of Winchester, but others had gone back to the town and were making an equitable division of the Northern stores among the different regiments. Harry and Dalton were sent with those who went to the town. On their way Harry saw St. Clair and Langdon lying under an apple tree, still and white. He thought at first they were dead, but stopping a moment he saw their chests rising and falling with regular motion, and he knew that they were only sleeping. The whiteness of their faces was due to exhaustion.