He rode slowly out through the gap, following the fresh trail. As before, it was made by the horse with the notch in its left hind hoof. It led to a hill three-quarters of a mile beyond the fence. From this point it struck a line for the distant ranchhouse.

Lambert did not go beyond the hill. Dismounting, he stood surveying the country about him, struck for the first time by the view that this vantage-point afforded of the domain under his care. Especially the line of fence was plainly marked for a long distance on either side of the little ridge where the last cut had been made. Evidently the skulker concealed himself at this very point and watched his opening, playing entirely safe. That accounted for all the cutting having been done by daylight, as he was sure had been the case.

He looked about for trace of where the fellow had lain behind the fringe of sage, but the ground was so hard that it would not take a human footprint. As he looked he formulated a plan of his own. Half a mile or more beyond this hill, in the direction of the Kerr place, a small butte stood, its steep sides grassless, its flat top bare. That would be his watchtower from that day forward until he had his hand on this defiant rascal who had time, in his security, to stop and write a note.

That night he scaled the little butte after mending the fence behind him, leaving his horse concealed among the huge blocks of rock at its foot. Next day, and the one following, he passed in the blazing sun, but nobody came to cut the fence. At night he went down, rode his horse to water, turned him to graze, and went back to his perch among the ants and lizards on top of the butte.

The third day was cloudy and uneventful; on the fourth, a little before nine, just when the sun was squaring off to shrivel him in his skin, Lambert saw somebody coming from the direction of Kerr's ranch.

The rider made straight for the hill below Lambert's butte, where he reined up before reaching the top, dismounted and went crawling to the fringe of sage at the farther rim of the bare summit. Lambert waited until the fellow mounted and rode toward the fence, then he slid down the shale, starting Whetstone from his doze.

Lambert calculated that he was more than a mile from the fence. He wanted to get over there near enough to catch the fellow at work, so there would be full justification for what he intended to do.

Whetstone stretched himself to the task, coming out of the broken ground and up the hill from which the fence-cutter had ridden but a few minutes before while the marauder was still a considerable distance from his objective. The man was riding slowly, as if saving his horse for a chance surprise.

Lambert cut down the distance between them rapidly, and was not more than three hundred yards behind when the fellow began snipping the wire with a pair of nippers that glittered in the sun.

Lambert held his horse back, approaching with little noise. The fence-cutter was rising back to the saddle after cutting the bottom wire of the second panel when he saw that he was trapped.