And so the fray went on, until, Confederate reinforcements coming on, the Union soldiers were forced to retreat, and the Montgomery Grays returned in triumph to their own division, dragging the cannon after them. As they moved on General Longstreet swept by them on his charger. “Good, boys; good!” he cried, waving his sword. “Keep it up and the day is ours!” “Carry the news to Jefferson Davis!” yelled Leroy, after him, and the Confederate general turned in his saddle and smiled. An instant later the smoke of battle swallowed him up. But now even the horses were beginning to show signs of fatigue, and the greater part of the company were compelled to fall back several hundred feet farther, where there was a small stream flowing into Bull Run. Here men and beasts procured much-needed drink and stopped to get their “second wind.” Hardly was Andy again in the saddle when the bugle called him and his fellow-cavalrymen to a new position along the side of the hill before mentioned. To gain this new position the Montgomery Grays had to cross an open space probably three hundred feet in diameter--a clearing well covered by the batteries of the Union army. “Forward, and lose no time!” cried Captain Montgomery, and led the way, followed almost immediately by a score of his men, with Andy and Leroy in the number. The captain had scarcely covered a quarter of the distance when, suddenly, his horse, a powerful gray stallion, was seen to rear up viciously and take the bit between his teeth. “Whoa!” roared the Confederate commander, but instead of obeying the stallion reared again, then dropped like a flash and shot off on a mad gallop, directly for the Union lines! “The captain’s horse is running away!” cried Leroy. “Whoa! Whoa!” “He’ll be carried into the enemy’s lines!” yelled another of the men. “Turn him to yer right, cap’n! To the right!” “Whoa, Harry!” cried the captain, tugging in vain at the reins. Harry would not whoa, but with blazing eyes kept straight on, until the ranks of the enemy could be plainly seen. But now came rapid hoof-strokes from behind. From the start Andy had realized his captain’s danger and wondered how it could be averted. He knew that trying to stop Harry by pulling on the reins or calling to him was out of the question. The horse had lost his head and would not obey until exhausted. “Forward, Firefly!” he called to his own animal, and, trained to obey on the moment, brave Firefly flew out of the line and in full pursuit of the runaway. “Come back! It’s certain death!” yelled Leroy, in horror; but if Andy heard he paid no attention. On and on he went, until the very side of the runaway was gained. The advance line of the enemy was now less than a hundred feet away. Several rifles rang out and the bullets whistled on every side.