RADIO BOYS IN THE SECRET SERVICE;
or, Cast Away on an Iceberg.
RADIO BOYS IN THE FLYING SERVICE;
or, Held For Ransom by Mexican Bandits.
RADIO BOYS IN THE THOUSAND ISLANDS;
or, The Yankee-Canadian Wireless Trail.
RADIO BOYS UNDER THE SEA;
or, The Hunt for Sunken Treasure.

COPYRIGHT 1923. BY M. A. DONOHUE & CO.
MADE IN U. S. A.

CONTENTS

I.[A Daring Leap]
II.[By Land and Sea]
III.[Radio and Its Wonders]
IV.[Strange Happenings]
V.[Marooned]
VI.[The Sunken Treasure]
VII.[A Hazardous Venture]
VIII.[Counting the Cost]
IX.[“Man Overboard!”]
X.[Lurking in the Shadows]
XI.[The Wrath of the Storm]
XII.[Shipwrecked]
XIII.[Under the Sea]
XIV.[The Tentacles of the Devil-Fish]
XV.[Torn Apart]
XVI.[Wave-Tossed]
XVII.[An Uncanny Experience]
XVIII.[Gold and Jewels]
XIX.[A Perplexing Mystery]
XX.[The Earthquake]
XXI.[From the Ocean Bed]
XXII.[Quelling a Mutiny]
XXIII.[The Horrors of the Lagoon]
XXIV.[Cheating the Sharks]
XXV.[In Deadly Danger]
XXVI.[The Volcano Wakes]
XXVII.[On the Alert]
XXVIII.[A Flag of Truce]
XXIX.[A Fight for Life]
XXX.[Victory!]

RADIO BOYS UNDER THE SEA

CHAPTER I
A DARING LEAP

Down the road came plunging a runaway horse, his eyes blazing and his mouth flecked with foam.

In the light buggy that rocked and bounced behind him, threatening at any moment to overturn, stood a young man, sawing at the reins with all his strength. But though he was stalwart and vigorous, his strength availed nothing against the power of the maddened brute.