PROLOGUE
CHAPTER I
Vanished!
CHAPTER II
Tragedy’s Aftermath
CHAPTER III
The First Clue
CHAPTER IV
Benson’s Ally
CHAPTER V
The Camouflaged Plane
CHAPTER VI
Mac Gums The Works
CHAPTER VII
Murder on Wheels
CHAPTER VIII
Mike and Ike
CHAPTER IX
Smitty Joins Up
CHAPTER X
Crime Plans Anew
CHAPTER XI
The Trapdoor Plane
CHAPTER XII
Smitty Takes the Risk
CHAPTER XIII
The Clue
CHAPTER XIV
Isle Royale
CHAPTER XV
Island Prisoners
CHAPTER XVI
Quick-Change Artist
CHAPTER XVII
Sleet of Death
CHAPTER XVIII
The Big Shot
CHAPTER XIX
Three Against Crime
