CHAPTER

         Introduction
      I. The war terror
     II.  The electro-magnetic gun
    III.  The murder syndicate
     IV.  The air pirate
      V. The ultra-violet ray
     VI.  The triple mirror
    VII.  The wireless WIRETAPPERS
   VIII.  The houseboat mystery
     IX.  The radio detective
      X. The curio shop
     XI.  The “Pillar of death”
    XII.  The arrow poison
   XIII.  The radium robber
    XIV.  The spinthariscope
     XV.  The ASPHYXIATING safe
    XVI.  The dead line
   XVII.  The paste replica
  XVIII.  The burglar’s microphone
    XIX.  The germ letter
     XX.  The artificial kidney
    XXI.  The poison bracelet
   XXII.  The devil worshipers
  XXIII.  The psychic curse
   XXIV.  The serpent’s tooth
    XXV.  The “Happy dust”
   XXVI.  The Binet test
  XXVII.  The lie detector
 XXVIII.  The family skeleton
   XXIX.  The lead poisoner
    XXX.  The electrolytic murder
   XXXI.  The eugenic bride
  XXXII.  The germ plasm
 XXXIII.  The sex control
  XXXIV.  The billionaire baby
   XXXV.  The psychanalysis
  XXXVI.  The ends of justice

INTRODUCTION

As I look back now on the sensational events of the past months since the great European War began, it seems to me as if there had never been a period in Craig Kennedy’s life more replete with thrilling adventures than this.

In fact, scarcely had one mysterious event been straightened out from the tangled skein, when another, even more baffling, crowded on its very heels.

As was to have been expected with us in America, not all of these remarkable experiences grew either directly or indirectly out of the war, but there were several that did, and they proved to be only the beginning of a succession of events which kept me busy chronicling for the Star the exploits of my capable and versatile friend.

Altogether, this period of the war was, I am sure, quite the most exciting of the many series of episodes through which Craig has been called upon to go.  Yet he seemed to meet each situation as it arose with a fresh mind, which was amazing even to me who have known him so long and so intimately.