The Phantom Clue: or, The Slave Bangle

Rouletabille book 4. English translation of Le Château Noir. Rouletabille tries to help his wife save a scientist and ends up accused of murder. Rouletabille Mysteries: 1. Mystery of the Yellow Room 2. The Perfume of the Lady in Black 3. The Secret of the Night 4. The Phantom Clue (or The Slave Bangle) 5. The Octopus of Paris (or The Sleuth Hound) 6. Rouletabille at Krupp's 7. The Crime of Rouletabille (no English translation) 8. Rouletabille and the Gypsies (no English translation)