"He's gone to get the glasses," explained Walt.

Presently Coyote Pete, very much out of breath from his dash down the path and up again, stood beside them. He had the glasses in his hand, and lost no time in applying them to his eyes. He had not had them there two minutes when he gave a quick exclamation and turned hastily to the boys.

"Lie down; lie down, every one of you," he ordered sharply.

They lost no time in obeying, as they knew that the old plainsman must have an excellent reason for such a command. The next instant Pete himself followed their example. Crouching low, he once more peered through the glasses above the edge of the cup-like depression.

"Who are they?" asked Jack in a low voice, wriggling his way to Pete's side.

"I'm not sure yet, but they are all armed. I caught the flash of sunlight on their rifles. If they are Mexican insurrectos, we are in a bad fix."

"Mexicans! What would they be doing this side of the border?"

"That remains to be seen. But I don't like the looks of it."

"Suppose they are Mexicans, Pete, would they do us any harm?"

"That depends a whole lot on whether they are on lawful business or not."