 Chapter Titles: 1. Agent of Treachery 2. The Hidden Witness 3. The  Lost Tunnel 4. Blades of Death 5. Roaring Wheels 6. Passage to  Danger 7. The Secret Code 8. Doomed Cargo 9. The Eyes of the Law  10.The Stolen Body 11.The Death Trap 12.Talk of Die! 13.Unmasked