"Both of 'em?" snapped Quigley. "One had to stay on guard. An' they can't turn boots into moccasins. Cuss it! Why would innercent strangers wear moccasins in this kind of country? They wouldn't, unless they was up to some deviltry. Purdy, we got a job on our hands. First, we'll see Art an' Frank—no we won't: I will. You foller these tracks an' find out what you can. Don't foller 'em longer than an hour. We'll meet right here. If you hear three shots so close together that they sound like a ripple, you cut h—l-bent for th' ranch, by a roundabout way," and he was gone before Purdy could answer him.

Purdy ran forward, his gaze on the ground, and every time the trail became lost on clean, hard rock, he swore impatiently and ran in ever-widening circles until he found it again. Suddenly he crouched low and froze in his tracks. In an opening at the bottom of a deep, heavily wooded draw lying just ahead of him he caught sight of a black horse, saddled, cropping grass. The animal threw up its head, looked at him, flattened its ears and backed away, ready to bolt. And under his eyes lay four pairs of moccasin prints, two of them pointing back toward the Buttes.

"It's his bronc!" growled Purdy under his breath. "How th' devil—!" Wild conjectures filed into his mind in swift confusion, and, wrestling with them, he wheeled sharply and dashed back the way he had come, his Colt ready for action.

Quigley, calling into play every trick of woodcraft that he knew, kept on toward the Twin Buttes canyon, silent, alert, never once leaving cover. The smoke of the fire up on the butte was barely discernible now and the smoke from the rustlers' fire at the foot of the trail could not be seen at all. Eagerly he scrutinized the tops of the two buttes, but in vain.

Working steadily forward with the caution of an Indian, he followed and kept close to the eastern wall of the sink until directly back of the place where the trail guard should be, and in line with that and the lower end of the trail. His progress now became slow, and he exercised an infinite caution and patience. Cover followed cover, and every few yards he stopped and waited, his senses at the top pitch of their efficiency. Drawing near the position used by him and his men in guarding the mesa trail he passed within fifty feet of Luke Tedrue, and neither knew of it. Had he gone ten feet farther forward he would have died in his tracks.

He stopped. It was now Art's or Frank's turn to show some sign of life. Neither of them had any need to remain quiet, and he knew that under such circumstances a man is almost certain to make some kind of a noise within a reasonable length of time.

The minutes passed in absolute silence, and finally he could wait no longer, for each passing minute was precious to him, and he silently backed away, to approach from another direction. As he crept past a bowlder, avoiding every growing thing and every twig or loose pebble, he glanced along a narrow opening between some rocks and a thinning of the brush, and saw two sock-covered feet, toes up. It took him a long time to maneuver so that he could see enough of the body to be sure of its identity, and when he was sure he choked back a curse.

"Fleming!" he breathed. "Knifed through th' throat! An' they took his pants an' left a pair of blue ones. Nelson wore black! An' Frank, up there on th' other butte—I can't get up there without bein' seen. Frank, my boy; if yo're alive, you'll have to look out for yoreself!"

As he crawled and wriggled and dashed back over his trail his racing thoughts threw picture after picture on his mental screen, until every possible solution was eliminated and only the probable ones remained; and from these two there loomed up one which almost bore the stamp of certainty. The CL outfit, either wholly or in part, had arrived on the scene, and even now might be attacking the ranch-houses. Dashing around a pinnacle of granite, he sped down the slope of the draw where Purdy, behind a thicket, awaited him.

"Here, Tom!" softly called the waiting man, arising.