Chapter I NIGHT GETAWAY
Chapter II FORCED TESTIMONY
Chapter III THE AGENT'S HIDE-OUT
Chapter IV POLICE NET
Chapter V THE ACID THROWER
Chapter VI SINISTER SUMMONS
Chapter VII MASTERS OF DEATH
Chapter VIII TERRIBLE SECONDS
Chapter IX THE MURDERERS STRIKE
Chapter X TORTURE!
Chapter XI A CRY IN THE DARK
Chapter XII TRAPPED!
Chapter XIII THE PLUNGE
Chapter XIV THE MARK OF THE AGENT
Chapter XV THE INSPECTOR ARRIVES
Chapter XVI THE TERRIBLE TRIO
Chapter XVII ACROSS DARK WATERS
Chapter XVIII THE RAID
Chapter XIX MYSTERIOUS INSTRUCTIONS
THE END
