Contents

I. [WHAT CAME OF HENRY'S IDEA]
II. [HENRY OVERCOMES AN OBSTACLE]
III. [THE WIRELESS PATROL PREPARES FOR ACTION]
IV. [THE SCENE OF ACTION]
V. [THE MESSAGE IN CIPHER]
VI. [A NEW DANGER POINT]
VII. [CONFUSION WORSE CONFOUNDED]
VIII. [WHERE MONEY TALKED]
IX. [A FRESH START]
X. [THE PURSUIT IN THE DARK]
XI. [AN UNSUCCESSFUL SEARCH]
XII. [ANOTHER OBSTACLE]
XIII. [WHAT HENRY DISCOVERED]
XIV. [THE RIDDLE SOLVED]
XV. [ANOTHER MYSTERY UNRAVELED]
XVI. [AN UNEXPECTED MESSAGE]
XVII. [A CHANGE IN CIPHERS]
XVIII. [TOO LATE]
XIX. [THE ENEMY ESCAPES]
XX. [A CLUE FROM THE AIR]
XXI. [THE CAPTURE OF THE SPIES]
XXII. [A TASK ACCOMPLISHED]