Bob, who was still in the dark, was about to ask how he should go to work to "split" the herd after he had selected the men, but George did not give him the opportunity. The rumbling of the approaching hoofs grew louder and louder, and every moment was precious. It sounded before them and to the right and left of them, indicating that the herd was an immense one, and that it was advancing with a front broad enough to overwhelm the entire camp. Knowing that no more time could be wasted in debating the matter, George unslung his Winchester and fired two shots into the air. The effect was almost magical. The camp, which had been so quiet a second before, was aroused into instant life and activity. Loud cries of "Indians!" and " Fall in!" arose on the still air, followed by blasts from the bugle and stern notes of command. The officer of the guard was promptly on the ground, and to him Bob reported that a herd of stampeded buffaloes was bearing down upon them. The announcement startled the lieutenant, but he acted with the greatest coolness. As fast as the men came up he ordered them back to take care of the horses—all except a dozen or so of the best soldiers known to him, whom he ordered to follow him. By the time he had taken up his position, which was on a little rise of ground about fifty yards from post No. 7, Captain Clinton came up. Taking in at a glance the arrangements which his subordinate had made to avert the terrible danger that threatened the camp, he left him and his picked men to carry out those arrangements or perish in the attempt, while he hastened back to see that the horses were well secured.

"Steady!" commanded Lieutenant Earle, speaking in his loudest tones, in order to make his voice heard above the roar of the threatening hoofs, which sounded like the noise made by an approaching hurricane. "We are here to conquer or die. If we don't split that herd they will trample us out of sight in the ground. We can do it if we are only cool enough to hold our position. Don't fire until I give the word, and then put in the shots as rapidly as you know how."

Bob's hair fairly stood on end, and not even the calm bearing of George Ackerman, who was constantly by his side and who knew their danger better than he did, or the lieutenant's assurance that the herd could be split if they did their full duty, could relieve Bob's mind of the positive conviction that he and his comrades were doomed to certain and speedy death. But his courage never faltered, and to show that he did not intend to allow himself to be outdone in steadiness even by a shoulder-strap, he walked up and kneeling beside his officer (the men in the front rank were all kneeling, so that those in the rear rank could shoot over their heads) waited for the order to fire.

Nearer came the terror-stricken buffaloes, louder grew the thunder of their hoofs, and, as if to add to the horror of the situation and to test the courage of the lieutenant and his devoted little band to the very utmost, the horses behind them began to grow unmanageable from fright and to struggle desperately to escape from their fastenings.

At length, after a few moments of dreadful suspense, the time for action arrived. A rapidly-moving mass, which was plainly visible, owing to the fact that it was blacker than the darkness of the night, burst into view and bore down upon the camp and its little band of defenders. So loud was the noise made by their hoofs at this moment that the troopers did not hear the order to fire, which the lieutenant shouted out with all the power of his lungs; but they saw the flash of his revolver, and lost no time in opening a hot fire upon that portion of the herd which was directly in front of them. To Bob it seemed that the rapid discharges of their breech-loaders had no effect whatever. The black mass before him was as black and as dense, apparently, as it was when he first saw it, but, strange to say, instead of plunging upon him and his companions and trampling them out of all semblance to humanity, it seemed to remain stationary, although the deafening roar of those countless hoofs told him that the frantic herd had not in the least slackened its pace. In fact, his eyes and ears seemed to have suddenly become at "outs," for they did not endorse each other as they usually did. His eyes told him that his carbine was fired rapidly, for they showed him the flashes that followed the pulling of the trigger; but his ears took no note of the fact, for he could not hear the faintest report. The reason for this was, that the herd, having been split in two by the first volley, was moving by on each side of them with a roar and a rush that would have drowned the discharge of a section of artillery.

How long the buffaloes were in passing Bob never knew, for he took no note of time. It was probably not more than two or three minutes, but during that brief period he passed through an ordeal that he never could think of afterward without feeling the cold chills creep all over him. But he did not flinch, and neither did his companions. When the last of the buffaloes passed to the right and left of them, and the lieutenant jumped up and stretched his arms and legs as if to assure himself that he had not been stepped on anywhere, he found that not one of his men had moved from his place. The front rank was still kneeling, the rear rank was standing, and they were both as well aligned as they were before the firing commenced.

After ordering the front rank to rise, and bestowing upon them all a few hearty words of commendation, the lieutenant marched his men back to the camp, where they found some of their companions under arms, and the rest engaged in bringing in the horses and making them fast to the stable-lines. The animals were in such a state of alarm, and showed so strong a desire to run off with the retreating buffaloes, that Captain Clinton thought it advisable to put a strong guard over them for the rest of the night, with instructions to examine their fastenings every few minutes. When this guard had been detailed and the sentries had been changed, the rest of the troopers went back to their blankets.

Bob and George were proud of the part they had acted in saving the camp from destruction, and consequently when they spread their blankets beside one of the fires they were somewhat provoked to hear the man who was piling fresh fuel upon it attribute their narrow escape to "luck." But still there was nothing very surprising in this, for it not infrequently happens that a soldier stationed in one end of a camp does not know what is going on in the other end of it, especially in times of excitement. The same thing happens in a fight. A soldier may be able to give a clear statement of the part his company took in it, but he knows nothing of the general plan of the battle or of the number of the killed, wounded, captured or missing, until he has had time to talk the matter over with his comrades or to read a published account of it. During the war it was a common saying among the soldiers in the field that they never knew anything about the fights they had been in until they saw the papers.

"I have been on the Plains nearly three years," said the trooper who was punching up the fire, "and that was the first time I ever saw a herd of stampeded buffaloes."

"I never saw one," said another trooper. "I heard this one, but my horse kept me so busy that I couldn't take time to look at it."