Produced by Roger Frank and the Online Distributed Proofreading Team at http://www.pgdp.net (This book was produced from images made available by the HathiTrust Digital Library.)
[Illustration: They were all crouched low to avoid being seen from the deck.]
“The Radio Boys on the Mexican Border,” “The Radio Boys with the Revenue Guards,” “The Radio Boys’ Search for the Inca’s Treasure,” “The Radio Boys Rescue the Lost Alaska Expedition.”
CHAPTER I—FRANK “LISTENS IN” CHAPTER II—LOOSE ENDS OF A PLOT CHAPTER III—THE MAN OF MYSTERY AGAIN CHAPTER IV—ENTER INSPECTOR BURTON CHAPTER V—THE SOUND DETECTOR CHAPTER VI—IN THE ENEMY’S TOILS CHAPTER VII—A BREAK FOR LIBERTY CHAPTER VIII—CHINATOWN WINS CHAPTER IX—THE POWER OF THE UNDERWORLD CHAPTER X—CARRIED CAPTIVE TO SEA CHAPTER XI—“BEST LAID PLANS” CHAPTER XII—A STORM AT SEA CHAPTER XIII—HOPE IS “IN THE AIR” CHAPTER XIV—THE UPPER HAND REGAINED CHAPTER XV—ABANDON SHIP CHAPTER XVI—DOCTOR MARLEY EXPLAINS CHAPTER XVII—LOST TRAIL CHAPTER XVIII—CLOSING IN CHAPTER XIX—THE SOUND DETECTOR DETECTS CHAPTER XX—IN AT THE DEATH CHAPTER XXI—AT SANTA CRUZ ISLAND CHAPTER XXII—IN THE SMUGGLERS’ COVE CHAPTER XXIII—A SIGNAL FROM THE RADIO STATION CHAPTER XXIV—A SPY CAPTURED CHAPTER XXV—A FORLORN HOPE CHAPTER XXVI—A SURPRISE ATTACK CHAPTER XXVII—BLACK GEORGE CAPTURED CHAPTER XXVIII—REWARDS AHEAD CHAPTER XXIX—A LOOK INTO THE FUTURE
“Excuse me for butting in, stranger,” said a pleasant voice at the door of the Pullman stateroom, “but I heard you talkin’ to these boys about the old mining camps in these California mountains. It’s kind of tiresome with nobody to talk to, ridin’ all day. Mind if I come in? Mebbe I can tell you some things interesting to easterners. I’m an old-timer here.”
“Come right in,” said Mr. Temple, rising and extending his hand. “My name’s Temple, George Temple. And this is my son, Bob, and his chums, Jack Hampton and Frank Merrick.”
“My name’s Harlan, Ed Harlan,” said the other, advancing. “I was born and raised in the mountains. My dad was a forty-niner from Tennessee.”
He was a slim middle-aged man in black, with a black sombrero worn at a rakish angle.
Those who have read _The Radio Boys on the Mexican Border_ are familiar with Mr. Temple and the three chums. Living in country homes on the far end of Long Island, they had been drawn by a web of circumstances into international intrigue on the Mexican Border. Jack’s father, representative of a syndicate of independent oil operators, had been kidnapped by Mexican rebels seeking to embroil the government with that of the United States. The boys had gone into Mexico and rescued him. Now Mr. Temple, a New York importer, was making a business trip to San Francisco and taking them with him.