"That is my guess."

Ballard laughed.

"Mine isn't quite as practical, I'll admit; but I believe it is the right one. I've been probing Hoskins's record quietly, and his long suit is superstition. Half the 'hoodoo' talk of the camp can be traced back to him if you'll take the trouble. He confessed just now that he never passed that point in the road without thinking of Braithwaite and his taking-off. From that to seeing things isn't a very long step."

Bromley made the sign of acquiescence.

"I'd rather accept your hypothesis than mine, Breckenridge. I'd hate to believe that we have the other kind of a fool on the job; a man who would deliberately make scare medicine to add to that which is already made. What will you do with Hoskins?"

"Let him work in the repair shop for a while, till he gets the fever out of his blood. I don't want to discharge him."

"Good. Now that is settled, will you take a little walk with me? I want to show you something."

Ballard found his pipe and filled it, and they went out together. It was a perfect summer afternoon, still and cloudless, and with the peculiar high-mountain resonance in the air that made the clink of the stone hammers ring like a musical chorus beaten out upon steel anvils. Peaceful, orderly industry struck the key-note, and for the moment there were no discords. Out on the great ramparts of the dam the masons were swinging block after block of the face wall into place, and the burr-r and cog-chatter of the huge derrick hoisting gear were incessant. Back of the masonry the concrete mixers poured their viscous charges into the forms, and the puddlers walked back and forth on their stagings, tamping the plastic material into the network of metal bars binding the mass with the added strength of steel.

Bromley led the way through the stone-yard activities and around the quarry hill to the path notched in the steep slope of the canyon side. The second turn brought them to the gap made by the land-slide. It was a curious breach, abrupt and clean-cut; its shape and depth suggesting the effect of a mighty hammer blow scoring its groove from the path level to the river's edge. The material was a compact yellow shale, showing no signs of disintegration elsewhere.

"What's your notion, Loudon?" said Ballard, when they were standing on the edge of the newly made gash.