Chapter I: Introduction

MY DEAR BOYS: This book is a complete story in itself, but forms the third volume in a line issued under the general title, "The Second Rover Boys Series for Young Americans."

As mentioned in a number of volumes of the first series, this line was started some years ago with the publication of "The Rover Boys at School," "On the Ocean," and "In the Jungle," in which I introduced my young readers to Dick, Tom, and Sam Rover. The volumes of the first series related the doings of these three Rover boys while attending Putnam Hall Military Academy, Brill College, and while on numerous outings.

Having acquired a good education, the three young men established themselves in business and became married. Presently Dick Rover was blessed with a son and a daughter, as was also his brother Sam, while Tom Rover became the proud father of twin boys. At first the four lads were kept at home, but then it was thought best to send them to a boarding school, and in the first volume of the second series, entitled "The Rover Boys at Colby Hall," I related what happened to them while attending this institution.

From Colby Hall the scene was shifted to Snowshoe Island, where the lads went for a mid-winter outing. Here they ran into a most unusual mystery, and helped an old lumberman to establish his claim to the island.

In the present volume the boys are back at Colby Hall, but it is time for the annual encampment of the military school, and soon they depart for a brief season "Under Canvas." This is at the time of the World War, and the lads get mixed up in the mystery surrounding a wrecked submarine. What this led to, I leave for the pages which follow to relate.

In conclusion I wish to thank my numerous readers for all the nice things they have said about my books. I trust the reading of the volumes will do all of them good.

Affectionately and sincerely yours,
EDWARD STRATEMEYER.

CONTENTS

CHAPTER PAGE

I A GAME OF BASEBALL 1

II ABOUT THE ROVER BOYS 12

III THE AMMUNITION FACTORY EXPLOSIONS 25

IV A RESCUE ON THE LAKE 35

V MEETING OLD ENEMIES 41

VI CELEBRATING THE BASEBALL VICTORY 56

VII FUN WITH CODFISH 66

VIII AN INTERRUPTED FEAST 76

IX A TELEGRAM FROM HOME 87

X ON THE WAY HOME 98

XI TOM ROVER'S DILEMMA 109

XII AT THE ROVER COMPANY OFFICES 120

XIII FUN AT A RAILROAD STATION 132

XIV BACK TO COLBY HALL 142

XV THE ELECTION FOR OFFICERS 153

XVI OFF FOR THE ENCAMPMENT 164

XVII A NIGHT ON THE ROAD 175

XVIII ONE SURPRISE AND ANOTHER 184

XIX AT CAMP BARLIGHT 194

XX FIRST DAYS UNDER CANVAS 202

XXI STRANGE NOISES 212

XXII AT THE RIFLE RANGES 221

XXIII GIRL VISITORS 231

XXIV TOM ROVER'S ANNOUNCEMENT 240

XXV AT CAMP HUXWELL 250

XXVI AN ASTONISHING DISCOVERY 260

XXVII ON BOARD THE SUBMARINE 271

XXVIII THE CABIN IN THE WOODS 282

XXIX THE FIGHT ON THE SUBMARINE 291

XXX AN IMPORTANT CAPTURE--CONCLUSION 300

THE ROVER BOYS UNDER CANVAS