The detonations were less frequent. Bull guessed that by now both hunters and hunted were under cover and thus able to take only occasional pot shots at one another's refuse.

To come upon them directly up the trail in the bottom of the canyon would have been to expose himself to the fire of one side, and possibly of both, for in this untamed country it was easily conceivable that both sides of the controversy might represent interests inimical to those of his employer. With this idea in mind the ex-foreman of the Bar Y Ranch clambered cautiously up the steep side of the hill that hid from his view that part of the canyon lying just beyond.

From the varying qualities of the detonations the man had deduced that five and possibly six rifles were participating in the affair. How they were divided he could not even guess. He would have a look over the crest of the hog-back and if the affair was none of his business he would let the participants fight it out by themselves. Bull, sober, was not a man to seek trouble.

Climbing as noiselessly as possible and keeping the muzzle of his rifle ahead of him he came presently to the crest of the narrow ridge where he pushed his way cautiously through the brush toward the opposite side, passing around an occasional huge outcropping of rock that barred his progress. Presently the brush grew thinner. He could see the opposite wall of the canyon.

A sharp report sounded close below him, just over the brow of the ridge. In front of him a huge outcropping reared its weather-worn surface twenty feet above the brush.

Toward this he crept until he lay concealed behind it. Then, warily, he peered around the up-canyon edge discovering that his hiding place rested upon tire very edge of a steep declivity that dropped perpendicularly into the bottom of the canyon. Almost below him five Apaches were hiding among the rocks arid boulders that filled the bottom of the canyon. U '-,,ion the opposite side a single man lay sprawled upon his belly behind another.

Bull could not see his face, hidden as it was beneath a huge sombrero, but he saw that he was garbed after the fashion of a vaquero-he might be either an American or a Mexican. That made no difference now, however, for there were five against him, and the five were Indians. Bull watched for a moment. He saw that the Indians were doing all the firing, and he wondered if the man lying across the canyon was already dead. He did not move.

Cautiously one of the Indians crept from cover as the other four fired rapidly at their victim's position, then another followed him and the three remaining continued firing, covering the advance of their fellows.

Bull smiled, that grim, saturnine smile of his. There were some red-skins in the vicinity that were dike for the surprise of their lives.

The two were working their way across the cangora, taking advantage of every particle of cover. They were quite close to the hiding place of the prone :ran now-in another moment the three upon Bull's side of the canyon would cease firing and the two would rush their unconscious quarry and finish him:

Bull raised his rifle to his shoulder. There followed two reports, so close together that it was almost inconceivable that they had come from the same weapon, and the two, who had already risen for the final attack, crumpled among the rocks beneath the blazing sun.

Instantly apprehending their danger, the other three Apaches leaped to their feet and scurried up the canyon, searching new cover as they ran; but it was difficult to find cover from a rifle holding the commanding position that Bull's held.

It spoke again, and the foremost Indian threw his hands above his head, spun completely around and lunged forward upon his face. The other two dropped behind large boulders.

Bull glanced across the canyon. He saw that the man had raised his head and was attempting to look around the edge of his cover, having evidently become aware that a new voice had entered the grim chorus of the rifles.

"Hit?" shouted Bull.

The man looked in the direction of the voice. "No," he replied.

"Then why in hell don't you shoot? There's only two of them left-they're up canyon on this side."

"Out of ammunition," replied the other.

"Well, you were in a hell of a fix," mused Bull as he watched the concealment of the two Indians.

"Any more of 'em than this bunch?" he called across to the man.

"No."

For a long time there was silence-the quiet and peace that had lain upon this age-old canyon since the Creation-and that would lie upon it forever except as man, the disturber, came occasionally to shatter it.

"I can't lie here all day," mused Bull. He crawled forward and looked over the edge of the cliff. There was a sheer drop of forty feet. He shook his head. There was a sharp report and a bullet tore up the dirt beneath him. It was followed instantly by another report from across the canyon.

Bull kept his eyes on the cover of the Indians. Not a sign of them showed. One of them had caught him napping-that was all-and ducked back out of sight after firing, but how was the man across the canyon firing without ammunition?

"I got one then," came the man's voice, as though in answer, "but you better lie low-he come near getting you."

"Thought you didn't have no ammunition," Bull called across.

"I crawled out and got the rifle of one of these you potted."

Bull had worked his way back to his cover and to the brush behind it and now he started up along the ridge in an attempt to get behind the remaining Indian.

A minute or two later he crawled again to the edge of the ridge and there below him and in plain sight the last of the red-skins crouched behind a great boulder. Bull fired and missed, and then the Apache was up and gone, racing for his pony tethered further up the canyon.