| CHAPTER | PAGE | |
| I | How It Happened | [13] |
| II | The First Dip Under the Surface | [20] |
| III | A Peril of Tropical Waters | [31] |
| IV | The Indian Shark-Killer | [38] |
| V | Giving the Enemy the Slip | [46] |
| VI | Treasure Island | [55] |
| VII | Wonderful Under-the-Sea Sights | [63] |
| VIII | “Talk About Luck!” | [71] |
| IX | The Diver at Work | [79] |
| X | Spied Upon | [90] |
| XI | Equal to the Emergency | [97] |
| XII | The Water Chase | [105] |
| XIII | Recovering the Treasure | [113] |
| XIV | Ingots of Gold | [121] |
| XV | When Morning Came | [129] |
| XVI | Left Holding the Bag | [138] |
| XVII | Via Wireless | [146] |
| XVIII | In the Canal Locks | [157] |
| XIX | Blocking the Game of Badger | [164] |
| XX | The End of the Cruise—Conclusion | [173] |
THE MOTION PICTURE
COMRADES ABOARD
A SUBMARINE
CHAPTER I
HOW IT HAPPENED
“Jack will be back from the express office soon, and then, I take it, if everything is shipshape, this queer contraption they call a diving-boat and named the Argonaut, expects to get away from Baltimore, eh, Oscar?”
“So the Captain told me, Ballyhoo. He has his clearance papers, all right.”
“Huh! Guess the port officials didn’t examine this craft as closely as they might have done in these troublous times, with more than half the world ablaze.”
“Lower your voice a bit, Ballyhoo, when you are referring to the rifles, and that quick-firing gun they’ve got so snugly hidden below. But it’s all fair and square. Every steam craft is allowed one gun for defensive purposes. Some big Atlantic liners have a three-inch gun at the stern, you remember.”
“A very good reason we have, too, for carrying one, Oscar, since the main object of our trip to tropical seas is the recovery of sunken treasure.”
“And don’t forget either, while about it, Ballyhoo, that there’s opposition in the field, a rival expedition headed by that old blockade-runner and adventurer, Captain Badger.”
“That’s right, and we may need our gun badly before we come back again—if we ever do.”