"There seem to be a good many of them, but I think we'd better charge, boys." He touched his mare and trotted forward, calling in a soothing tone, "Yes, that's what we'll do. Charge, boys, charge." Some of the men laughed explosively, partly with nervousness, partly with amusement at their commander's quaint orders, but not one hesitated. Spreading out in a long, irregular line, they dashed at the hill, shouting, "Death to the murderers!" But as they approached the crest, again laughter broke out, rolling from one flank of the line to the other and back again, in boisterous waves. The supposed Indians were nothing more than a patch of mullen stalks, transformed by distance and the peculiar condition of the air into a resemblance to human beings. The men looked at each other sheepishly, but as they reached the top of the hill, they sobered again. The three real Indians were just disappearing down a ravine on the other side. Pell-mell the cavalry rushed after them, Captain Miner and Sergeant English now in the lead. The horses slid and stumbled down through the ravine, but the wily savages were still ahead, dodging about among obstructions to the view which none but Indians could have found. Presently the ravine widened out into a valley in which no sign of life was to be seen. The whole body of cavalry was going on into the valley when suddenly the Indians rose as if from the ground, a little way to one side of the course the soldiers were taking, and fired at the Captain and the Sergeant, behind whom Al was closely following. The fugitives had taken refuge in an old buffalo wallow, forming a perfect natural rifle-pit; and if they had not mistakenly thought themselves discovered and risen to fire, their pursuers would probably have swept by without finding them. But now they were brought to bay and with cheers and yells of delight a number of troopers sprang from their saddles and encircling the buffalo wallow, though at some distance from it, threw themselves flat on the ground with carbines cocked, waiting for an Indian to show himself. It was like a pack of wolves surrounding their quarry. Fortunately, neither the Captain nor Sergeant English had been injured by the first fire and they joined the circle of besiegers, while the men who were holding the horses formed a wider circle back on the prairie out of range.