Mystery Stories for Boys

1. Triple Spies 2. Lost in the Air 3. Panther Eye 4. The Crimson Flash 5. White Fire 6. The Black Schooner 7. The Hidden Trail 8. The Firebug 9. The Red Lure 10. Forbidden Cargoes 11. Johnny Longbow 12. The Rope of Gold 13. The Arrow of Fire 14. The Gray Shadow 15. Riddle of the Storm 16. The Galloping Ghost 17. Whispers at Dawn; or, The Eye 18. Mystery Wings 19. Red Dynamite 20. The Seal of Secrecy 21. The Shadow Passes 22. Sign of the Green Arrow

The Radio-Phone Boys’ Series

1. Curlie Carson Listens In 2. On the Yukon Trail 3. The Desert Patrol 4. The Seagoing Tank 5. The Flying Sub 6. Dark Treasure 7. Whispering Isles 8. Invisible Wall

Adventure Stories for Girls

1. The Blue Envelope 2. The Cruise of the O’Moo 3. The Secret Mark 4. The Purple Flame 5. The Crimson Thread 6. The Silent Alarm 7. The Thirteenth Ring 8. Witches Cove 9. The Gypsy Shawl 10. Green Eyes 11. The Golden Circle 12. The Magic Curtain 13. Hour of Enchantment 14. The Phantom Violin 15. Gypsy Flight 16. The Crystal Ball 17. A Ticket to Adventure 18. The Third Warning

Transcriber’s Notes