"He had his nerve with him," said Old Billee. "But, boys, we mustn't let him get ours. He came to spy out and see what he could pick up."

"Well, he found us ready for him!" exclaimed Yellin' Kid.

"Yes, but maybe he'll go back and report that we aren't ready enough," said Billee.

"What do you mean?" asked Bud.

"I mean he has sized up our force, and he and his gang may be able to bring up enough to beat us back. You see, boys, this land is a rich prize, not only for sheep men but for any who want to use it for grazing. It has water and good grass."

"Well, what's the matter with 'em stayin' on their own side of Spur Creek?" asked Snake, growling out the words.

"That's where they should stay, by rights," said Billee, "and it's where we intend to keep 'em. The other land is open to those who stake it out, I suppose, but on this side it belongs to your father, Bud."

"The trouble is he has to prove it," answered the boy rancher.

"Yes, and that's going to be hard with his papers stolen the way they are," admitted Billee. "Of course it was a put up job, and I have my suspicions of who did it. But this land would be a rich prize for a sheep herder or anybody else, and we've got to fight 'em off."

"Who are you suspicious of?" demanded Bud.