The ponies leaped forward. The man and the two boys were riding a dangerous pace considering the roughness of the trail, but none gave a thought to the danger. The captain's voice was raised in a long-drawn hoot, which was answered by another from some distance away. Then the firing broke out afresh. It seemed as if no one could escape that fusillade of bullets. Tad could hear the bullets screaming overhead. He sat his pony, his eyes glowing, firing rapidly into the air. Stacy Brown also sat his own pony, but he couldn't have moved a muscle to save him. The fat boy was literally "scared stiff." Stacy really was suffering, but no one, unless he had observed his eyes, would have thought him afraid.

"Close in, boys. Ride and shout!" commanded the captain.

Butler exercised his lungs. Chunky's lips moved, but no sound came from them. His pony, however, followed the others, nearly causing its stiffened rider to fall off.

Every few moments the captain would utter his owl-call, which would be answered by other similar calls pretty much all around the compass. In this way the Rangers were able to locate each other's positions, thus avoiding shooting each other.

The shots of the enemy were now scattering.

It was only occasionally that McKay was able to determine that one of the bandits had fired a gun. How he could tell the difference between the rifles of friends and foe was a mystery to young Butler. Ere long the Rangers had narrowed down their circle until they were able to see each other. For the past twenty minutes, they had been stalking cautiously. Now they paused, after having exchanged signals. Deep growls were heard on all sides.

"What does it mean?" questioned Tad.

"It means those fellows have given us the slip again," grunted the captain. "They've managed to slip through our lines somehow. Well, never mind, we'll get them one of these times. I thought we had them pocketed this time so there would be no escape."

Tad had thought so, too. He was convinced that there was more to this escape than even the Ranger captain realized. The boy did not wish to make suggestions so he kept silent. Yet he determined to make an investigation on his own hook on the following morning, provided they were anywhere in that vicinity.

There was nothing more that the Rangers could do. Their prey had eluded them, disappearing as suddenly as if through a hole in the earth. It was the first time that such a thing had occurred to Captain McKay and his failure bothered him, but he presented a smiling face when, after having withdrawn a mile or so, the men went into camp for the rest of the night, building up a campfire and putting out a heavy guard to prevent a surprise during the night.