There were four of the rocks which were of sufficient size to afford concealment for a man. They varied in size and were ranged along the side of the trail in an irregular line. All were about a hundred feet distant.
The smaller one, he decided, was not to be considered, though he looked suspiciously at it before making his decision. Its neighbor was larger, though he reasoned that if he were to make a selection for an ambuscade he would not choose that one either. The other two rocks were almost the same size and he watched them warily. To the right and left of these rocks was a clear space, flat and open, with not a tree or a bush large enough to conceal danger such as he was in search of. The slope up which he had just driven the horses was likewise free from obstruction, so that if his enemy was behind any of the rocks he was doomed to stay there or offer himself as a target for Calumet's pistol.
"Wise, I reckon," he sneered. "Figgered to plug me while the horses was restin', knowin' I'd have to breathe them about here. Thought one shot would get me. Missed his reckonin'. Must be a mite peeved by this time."
His gaze became intent again, but this time it was directed to some underbrush about two hundred yards distant, back of the rocks. With some difficulty he could make out the shape of a horse standing well back in the brush, and again he grinned.
"That's why he took that side," he said. "There's no place on this side where he could hide his horse. It's plumb simple."
From where he kneeled began another slope that descended to the Lazy Y valley. It dipped gently down into the wood in front of the house, where he had hitched his horse on the night of his home-coming, and between the trees he could see a light flickering. The light came from the kitchen window of the ranch-house; Betty had left it burning for him, expecting him to return shortly after dusk. The house was not more than a mile distant and he wondered at the hardihood of his enemy in planning to ambush him so close to his home. He reflected, though, that it was not likely that the shots could be heard from the house, for the spot on which the wagon stood was several hundred feet above the level of the valley, and then there was the intervening wood, which would dull whatever sound might float in that direction.
Who could his assailant be? Why, it was Taggart, of course. Taggart had left town hours before him, he was a coward, and shooting from ambush is a coward's game.
Calumet's blood leaped a little faster in his veins. He would settle for good with Neal Taggart. But he did not move except to draw one of his six-shooters and push its muzzle over the edge of the gully. He shoved his arm slowly forward so that it lay extended along the ground the barrel of the pistol resting on the felloes of the wheel.
In this position he remained for half an hour. No sound broke the strained stillness of the place. The horses had sagged forward, their heads hanging, their legs braced. There was no cloud in the sky and the clear light of the moon poured down in a yellow flood. Calumet's task would have been easier if he could have told which of the four rocks concealed his enemy. As it was he was compelled to watch them all.
But presently, at the edge of one of the two larger rocks, the one nearest the slope, he detected movement. A round object a foot in diameter, came slowly into view from behind the rock, propelled by an unseen force. It was shoved out about three quarters of its width, so that it overlapped the big rock beside it, leaving an aperture between the two of perhaps three or four inches. While Calumet watched a rifle barrel was stuck into this aperture. Calumet waited until the muzzle of the rifle became steady and then he took quick aim at the spot and pulled the trigger of his six-shooter, ducking his head below the edge of the gully as his weapon crashed.