"I hate to get the barrel all sanded up," Lone objected mildly. "You can pack it, can't you?" He grinned a little as he handed out the gun, muzzle toward himself. "You're playing safe, Swan, but if that dog of yours is any good, you'll have a change of heart pretty quick. Isn't that a man's track, just beside that flat rock? Put the dog on, why don't you?" "Yack is on already," Swan pointed out. "Ride ahead of me, Lone." With a shrug of his shoulders Lone obeyed, following the dog as it trotted through the brush on the trail of a man's footprints which Swan had shown it. A man might have had some trouble in keeping to the trail, but Jack trotted easily along and never once seemed at fault. In a very few minutes he stopped in a rocky depression where a horse had been tied, and waited for Swan, wagging his tail and showing his teeth in a panting smile. The man he had trailed had mounted and ridden toward the ridge to the west. Swan examined the tracks, and Lone sat on his horse watching him. Jack picked up the trail where the horseman had walked away toward the road, and Swan followed him, motioning Lone to ride ahead. "You could tell me about this, I think, but I can find out for myself," he observed, glancing at Lone briefly. "Sure, you can find out, if you use your eyes and do a little thinking," Lone replied. "I hope you do lay the evidence on the right doorstep." "I will," Swan promised, looking ahead to where Jack was nosing his way through the sagebrush. They brought up at the edge of the road nearly a quarter of a mile nearer Echo than the place where Frank's body had been found. They saw where the man had climbed into the wagon, and followed to where they had found Frank beside the road, lying just as he had pitched forward from the wagon seat. "I think," said Swan quietly, "we will go now and find out where that horse went last night." "A good idea," Lone agreed. "Do you see how it was done, Swan? When he saw the team coming, away back toward Echo, he rode down into that wash and tied his horse. He was walking when Frank overtook him, I reckon--maybe claiming his horse had broke away from him. He had a rock in his handkerchief. Frank stopped and gave him a lift, and he used the rock first chance he got. Then I reckon he stuck the whisky bottle in Frank's pocket and heaved him out. He dropped the handkerchief out of his hip pocket when he jumped out of the rig. It's right simple, and if folks didn't get to wondering about it, it'd be safe as any killing can be. As safe," he added meaningly, "as dragging Fred Thurman, or unhooking Brit's chain-lock before he started down the canyon with his load of posts." Swan did not answer, but turned back to where the horse had been left tied and took up the trail from there. As before, the dog trotted along, Lone riding close behind him and Swan striding after. They did not really need the dog, for the hoofprints were easily followed for the greater part of the way.