Horace Dorrington clears up the mystery of the theft of a valuable diamond.
A Message from the Deep Sea
The Missing Witness Sensation
The Affair of the Avalanche Bicycle and Tire Co.
The Duchess of Wiltshire's Diamonds
The Horse of the Invisible
The Case of the Mirror of Portugal
Madame Sara
The Case of the Dixon Torpedo
The Woman in the Big Hat
The Affair of the Tortoise
The Assyrian Rejuvenator
The Ripening Rubies
The Case of Laker, Absconded