"Only a coyote," remarked Nort, as he caught sight of a slinking figure under the light of the stars. The boys had become used to these creatures which acted as scavengers of the plains.

"I wonder if, after all, those professors can be hunting gold?" mused
Dick, when his horse had quieted down and resumed grazing.

"According to what Bud says there isn't any gold here and never has been," declared Nort. "But there is a mystery about them and I'd give a lot to solve it. You see we tenderfeet don't count for much out on a ranch—that is, yet. We don't know much about roping or shooting or riding herd. Of course we're learning, and Bud and the others are as nice about it as they can be, but I can see they don't think overly much about our abilities; and I don't blame them.

"But if we could solve this mystery about those professors, and maybe connect 'em up with some of the cattle rustling, why it would show Bud we easterners amounted to something after all. I sure would like to get on the track of this mystery!"

The time was to come, and soon, when Nort and Dick vividly recalled these words.

"Well, we're here—not that we know where it is—but we're here, and not in such bad shape," spoke Dick. "We're lost, but I reckon Bud will find us in the morning, or we'll come across the cattle we're looking for, or else Diamond X ranch.

"I hope so," mused Nort. "I'd like to show these cowboys that we can pull off a trick or two ourselves."

"Well, I'm with you," and Dick's voice took on a drowsy note. In spite of the fact that he had said he was thinking of many things, the riding of the day soon began to tell on both lads.

"What's that?" suddenly called Dick to Nort, when they had, perhaps, been sleeping two or three hours. A wild, weird cry had echoed out in the silent night.

"Coyote," was the answer, sleepily given.