Mr. Temple was not to accompany the boys because, in the first place, his age and distinguished appearance would arouse suspicion.  Young fellows riding in to enlist in the rebel forces was something that could be understood.  But in his case it would be a different matter.

He would stay at the ranch with Rollins, whom he decided to give another chance.  Rollins knew the business details of the oil operations and unless he were retained the work could not go on.  For that reason, and also because he believed Rollins was truly repentant for his treachery and would be faithful in the future, Mr. Temple retained him.

Rollins had supplied valuable information for the expedition.  He gave the exact location of the Calomares ranch, in a valley amid low mountains more than one hundred miles to the south.

There were two possibilities that the boys might be recognized for what they were:  if Remedios should arrive at rebel headquarters, or if Von Arnheim or Morales recognized Bob as the youth who had foiled them on Long Island.  Neither was very likely.  Remedios, they learned from Rollins, had no intention of leaving the district because even if the boys tried to cause his arrest he had a mysterious political pull with the American officials, practically all of whom were of Mexican descent.  As for Morales and Von Arnheim they had had only a fleeting glimpse of Bob and he could disguise his appearance sufficiently to make that of no account.

“Well, boys,” said Mr. Temple finally, “if we all were back in New York under normal conditions I should consider this just about the craziest notion ever, and never would consent to your carrying it out.  But out here, amid these changed surroundings, it seems the natural thing to do.  For the life of me I can’t bring myself to feel any alarm.”

“That’s right, Dad,” said Bob.  “Don’t you worry.  We’ll be all right.”

It was now late afternoon.  Tom Bodine was to escort the boys to the border as soon as darkness fell, making a big swing around Ransome, so as to avoid notice, and set them on their way.  They would travel by horseback, all three having ridden since childhood.  There were a number of good mounts in the corral from which to select.

The boys planned to ride the major portion of the night until they should reach a cave in the first of the Mexican foothills, where they would spend the next day in hiding.  Tom Bodine knew the cave of old and was able to give the boys the location of certain landmarks which would make it easy for them to find it.  The following night they would continue their journey, and this should bring them to the Calomares ranch on the morning of the second day.

“Time to get ready,” said Mr. Temple, looking at his watch.  “And, remember, the very first thing you must try to do is to get into their radio station and call me.  Day or night, the men here will be watching for your signal and will call me.  I’ll be mighty anxious about you.  So remember.”