As he spoke, the regiment broke into a run for the woods. They gave no further attention to the picking of their way, and struggled in the mire towards the high ground; but the merciless riflemen did not suspend their fire, and the soldiers continued to fall as the regiment advanced. In a few minutes it looked as though half the first company had fallen, either killed or wounded. The second company, and those in the rear of it, faced about, and retreated; and, having a better sod than those nearer the hill, they ran with all the speed they could command, though some of them sank down in the mire, and were pulled out by their companions. When they had fallen back out of rifle-range, they directed their flight towards the pike. The regiment in the rear halted when they saw the flight of the one in front of it. It was too far off for accurate firing. The men seemed to be appalled at the flight of the other regiment; and through their glasses the two officers could see that the commanding officer was making a speech to his men, but neither of them could see the extent of the casualties of the retreating command. Doubtless the colonel of the regiment, ashamed of the conduct of the fleeing infantry, was rallying his men for the advance; for presently it resumed its march. But at that moment a new factor in the contest was presented to the aide-de-camp. The roar of a heavy gun was heard in the direction of the intrenchment, and both of the spectators on the hill looked in that direction. A cloud of smoke rose in the air, and at the same moment, almost, the explosion of a shell was seen on the riflemen's hill. The branches of the trees were cut off and twisted, and the sharpshooters rushed down the declivity as though their own weapons had been turned against them. "Those riflemen have probably never been in a battle before," said the captain, apparently unmoved by the sight that greeted his eyes. "I should hardly expect to see them stand up against that sort of thing," added the major. "I never saw a shell explode before, and it must be very trying to the nerves of an inexperienced soldier." "He gets used to it after a time. But that shell must have killed or wounded some of Captain Ripley's command, though neither shells nor bullets are so destructive to human life as they appear to be at first." "I don't understand how that shell happened to be fired into the hill, for they could not see into the meadow where so many have fallen," said the major. "The information was probably sent into the fort by some officer on duty on the pike, near the earthworks, with an order to shell the second hill. But I think you had better return to your command, for your cavalry may be wanted at any time," suggested the captain. "That colonel has rallied his men, and they are now marching very steadily towards the higher land," said the major, as he rose from the seat on a rock he had occupied.