"Maybe," spoke Mr. Merkel musingly. "We'll have a look at their trail, if we can pick it up. But we've got a lot else to do first."

Indeed Diamond X ranch was a busy place in those days. Dick and Nort could not have come at a better time, and they were such apt pupils that they soon acquired many of the ways of the cowboys, who were willing and anxious to teach them. In a comparatively short time the two "tenderfeet" were no longer called that. They could shoot fairly well, though they were not "quick on the draw," and they were becoming more and more expert with the rope every day.

It was about two weeks after their experience with the unknown user of the lariat that Bud and his cousins were sent to ride herd at the Square M ranch, which was one of Mr. Merkel's holdings. He was planning to get a bunch of steers there ready for shipment, and a buyer was to come and look them over when they had been headed in from the open range to a large corral. Bud and his cousins were to help drive the animals in.

Square M ranch, so called because the brand was the letter M in a square, was a good two days' ride from Diamond X. But the boys had a fine time going, and found plenty to do when they arrived. Gradually the cattle were gathered up, and worked toward the corral.

They were within a day's ride of this haven, when, one afternoon, as Bud, Dick and Nort were moving on ahead of the bunch, which was driven by several cowboys, Bud looked back and let out a yell.

"What's the matter?" cried Nort.

"Stampede!" was the answer, "Oh, boy! Now look out for trouble!"

CHAPTER XV

LOST

Nort and Dick had heard and read so much about a cattle stampede, and heard such a calamity discussed at the ranch house so often, that they rather welcomed, than otherwise, the announcement that one was being staged near them. This was before they realized the full import of it, and saw the danger.