These were only a few of the many directions that were yelled at the tops of voices as the boy ranchers and their friends swept onward down the valley, converging on the band of men they believed to be cattle rustlers, if not something worse.

"Hands up, there!"

"Drop those guns!"

These commands came sternly from Mr. Merkel, Babe and Slim, while Dick and Nort, riding beside Bud, felt a wild thrill as they realized that they were to have a part in this strenuous fight. To possible danger they gave not a thought.

But if the attacking party thought everything was to be easy, it was not long before this idea vanished. After the first surprise, the Greasers, and other rough characters in the camp of the professors, regained their nerve, and prepared to fight. There were shouts in hissing Spanish, and Del Pinzo was observed to be rallying his followers.

Bud and his cousins had a glimpse of this wily Mexican leaping on his horse, and, surrounded by a number of evil-looking men, riding straight for the invaders.

"They're coming!" cried Nort.

"I see 'em!" muttered Dick.

"Keep together!" advised Bud in a wild cry. "Stay with me, and we'll ride right through 'em!"

Several weapons popped, and two or three saddles were emptied, one on the side of the Diamond X forces. Nort and Dick heard bullets whistling in the air over their heads, and though they may have ducked, instinctively, they did not after the first two or three of these nerve-racking experiences.