"At any sign of treachery, our first shot will be for them." Then to the peons: "Now march."

Without a word the peons, five in number, started back over the route by which they had come but a minute before.

"Where did the other American come from?" asked Billie of the peon nearest him as they rode along.

"Quien sabe, señor," was the hesitating response. "We saw him riding by and we followed him."

"That's the way with loud talkers," remarked Adrian. "When the test comes they usually weaken."

The firing, which had somewhat subsided for a few minutes, suddenly began again with renewed vigor, especially on the part of the ships.

"Our boys are getting ready for another advance," said Billie, and his manner became greatly excited. "Let's get there in time to take part."

"I'm willing," declared Adrian. "Come on!"

The two boys dug their spurs into their horses and dashed forward, upsetting a couple of the peons in their flight.

"Hold on!" called out Donald. "You'll get into trouble."