MYSTERY ***




Produced by Al Haines.




[Illustration: Cover]




[Illustration: "LOOK AT THE HIGH CLIFF, CAPTAIN," URGED BOB.--Page 169.]




                             DAVE FEARLESS
                        AND THE CAVE OF MYSTERY

                                   OR
                        _ADRIFT ON THE PACIFIC_


                                   BY
                              ROY ROCKWOOD

        Author of "Dave Fearless After a Sunken Treasure," etc.



                             _ILLUSTRATED_



                                NEW YORK
                         GEORGE SULLY & COMPANY




                             BOOKS FOR BOYS
                                   BY
                              ROY ROCKWOOD


                 DAVE FEARLESS AFTER A SUNKEN TREASURE
                   DAVE FEARLESS ON A FLOATING ISLAND
                 DAVE FEARLESS AND THE CAVE OF MYSTERY



                           Copyright 1918 BY
                         GEORGE SULLY & COMPANY



                          PRINTED IN U. S. A.




                                CONTENTS


CHAPTER

      I. Splendid Fortune
     II. Foul Play
    III. Mr. Schmitt-Schmitt
     IV. A Pair of Schemers
      V. Doctor Barrell's "Accident"
     VI. The Pilot's Plot
    VII. The Mysterious Jar
   VIII. Outwitting an Enemy
     IX. A Bold Project
      X. The Wooded Island
     XI. A Race for Life
    XII. Overboard
   XIII. Adrift on the Pacific
    XIV. Strange Companions
     XV. A Perilous Cruise
    XVI. Landed
   XVII. A Remarkable Scene
  XVIII. The Outcast's Secret
    XIX. A Day of Adventures
     XX. On Board the "Swallow"
    XXI. The Island Harbor
   XXII. The House of Tears
  XXIII. Ready for Action
   XXIV. In the Royal Palace
    XXV. The Captives
   XXVI. A Thrilling Adventure
  XXVII. The Poisoned Darts
 XXVIII. A Wild Ride
   XXIX. Found!
    XXX. Disaster
   XXXI. A Lucky Find
  XXXII. Conclusion




                 DAVE FEARLESS AND THE CAVE OF MYSTERY



                               CHAPTER I

                            SPLENDID FORTUNE


"It's gone!  It's gone!"

"What is gone, Dave?"

"The treasure, Bob."

"But it was on board--in the boxes."

"No--those boxes are filled with old iron and lead.  We have been
tricked, robbed! After all our trouble, hardship, and peril, I fear that
the golden reward we counted on so grandly has slipped from our grasp."

It was on the deck of the _Swallow_, moored in the harbor of a far-away
Pacific Ocean tropical island, that Dave Fearless spoke.  He had just
rushed up from the cabin in a great state of excitement.

Below loud, anxious, and angry voices sounded.  As one after another of
the officers and sailors appeared on the deck, all of them looked pale
and perturbed.

What might be called a terrific, an overwhelming discovery had just been
made by Captain Paul Broadbeam and by Dave's father, Amos Fearless, the
veteran ocean diver.

For two weeks, after a hard battle with the sea and its monsters, after
fighting savages and piratical enemies, the beautiful steamer, the
_Swallow_, had plowed through sun-tipped waves, favored by gentle
breezes, homeward-bound.

Every heart on board had been light and happy.  Labeled and sealed on
the sandy floor of the ballast room, lay four boxes believed to contain
over half a million dollars in gold coin.

Legally this vast treasure belonged to Amos and Dave Fearless, father
and son.  To those who had aided and protected them, however, from
Doctor Barrell, on board the _Swallow_ to make deep-sea soundings and
secure specimens of rare marine monsters for the United States
Government, down to Bob Vilett, Dave's chosen chum and the ambitious
young assistant engineer of the vessel, every soul on board knew that
when they reached San Francisco, the generous ocean diver and his son
would make a most liberal division of the splendid fortune they had
fished up in mid-ocean.

As said, the serenity of these fond hopes was now rudely blasted.  Dave,
rushing up on deck quite pale and agitated, had made the announcement
that brought Bob