1. [A Call for Help]
  2. [A Nest of Pirates]
  3. [Alex Takes a Long Chance]
  4. [A Night on Shore]
  5. [A Friend in Need]
  6. [Alex Gets a Square Meal]
  7. [Stolen—A Motor Boat]
  8. [Alex Climbs a Tree]
  9. [The Rambler Heard From]
  10. [A Bit of Dynamite]
  11. [Alex Goes Fishing]
  12. [A Queer Passenger]
  13. [On the Mexican Side]
  14. [A Serious Situation]
  15. [Dead in the Forest]
  16. [Jule in Great Danger]
  17. [On Mexican Soil Again]
  18. [A Slippery Customer]
  19. [Rube Tells a Story]
  20. [Taken at Last]
  21. [A Night of Watching]
  22. [A Surprise for Clay]
  23. [What Came of a Ramble on Shore]
  24. [And the Last]

THE RIVER MOTOR BOAT BOYS ON THE RIO GRANDE

CHAPTER I

A CALL FOR HELP

“Listen, boys!”

There was silence for a moment, and then the cry was repeated—a long, low, wailing call for help.

“It can’t be far away,” said the first speaker. “If the water wouldn’t make such a racket, we might locate it exactly. There! Sounds like the fellow was about all in.”

A large white bulldog of most disreputable appearance leaped to the railing of the motor boat and stood looking into the waters of the Rio Grande. In a moment the plea for assistance came again, sounding fainter and farther away.

It was evident that the man, whoever it was, was going down with the current. The dog glanced questioningly into the face of the nearest boy as if asking for instructions, and then leaped into the river.

“What did you do that for?” demanded Alexander Smithwick, throwing off his coat and shoes.