McHale, like Dunne himself, had seen rough times. Older than his employer, he had wandered up and down the West in the good old days of cheap land and no barbed wire, engaged in the congenial, youthful occupation of seeing as much country as he could. In the process, he had turned his hand to almost everything which had fresh air as a collateral, from riding for a cattle outfit to killing meat for railway camps. He and Dunne had come into the Coldstream country at nearly the same time; but Dunne had some money and McHale none at all. Dunne bought land and hired McHale. They worked side by side to make the ranch. McHale bought forty acres from Dunne and worked out the price, bought more, and was still working it out. But apart from financial matters they were fast friends, and either would have trusted the other with anything he possessed.

"Say," said McHale, "there's something wrong. Our ditches ain't runnin' more'n half full."

Casey put down the hammer. "Maybe the ditch is plugged somewhere."

"She may be, but it ain't likely. I've followed her quite a piece. So I come to get me a cayuse to go the rest of the way."

"I'll go with you," said Casey, throwing the harness on a peg.

In five minutes they were loping easily along the ditch, with sharp eyes for possible obstructions. As McHale had said, it was running not half full, and seemed to be falling. The strong, deep, gurgling note of a full head of water was gone. Instead was a mere babble.

So far as they could see, the flow was unhindered by obstacles; there was no break in the banks. Even around the treacherous sidehill there was no more than the usual seepage. And so at last they rode down to the Coldstream itself, to the intake of the ditch, a rude wing dam of logs, brush, and sand bags, which, nevertheless, had served them excellently heretofore.

"I'm an Injun," McHale, ejaculated, "if the whole durn creek ain't lowered!" Because he came from a land of real rivers, he invariably referred to the Coldstream thus slightingly.

But unmistakably it had fallen. Half the dam appeared above the surface, slimy, weed-grown, darkly water-soaked. Naturally, with the falling of the water, the ditch had partially failed.

The two men looked at each other. The same thought was present in the mind of each. It was barely possible that a land or rock slide somewhere high upstream had dammed or diverted the current; but it was most improbable. The cause was nearer to seek, the agency extremely human.