18 Chapters
- 1 SERIOUS NEWS
- 2 QUICK WORK
- 3 PICKED FOR SERVICE
- 4 THE HOUSE OF THE HELIOGRAPH
- 5 ON THE TRAIL
- 6 THE MYSTERY OF BRAY PARK
- 7 A CLOSE SHAVE
- 8 A FRIEND IN NEED
- 9 AN UNEXPECTED BLOW
- 10 A GOOD WITNESS
- 11 THE FIRST BLOW
- 12 THE SILENT WIRE
- 13 A TREACHEROUS DEED
- 14 THE TRAP
- 15 A DARING RUSE
- 16 THE CIPHER
- 17 A CAPTURE FROM THE SKIES
- 18 VINDICATION