The Adventure of the Blue Carbuncle

"The Adventure of the Blue Carbuncle" is one of 56 short Sherlock Holmes stories written by Sir Arthur Conan Doyle, the seventh story of twelve in the collection The Adventures of Sherlock Holmes. It was first published in Strand Magazine in January 1892. As London prepares for Christmas, newspapers report the theft of the near-priceless gemstone, the «Blue Carbuncle», from the hotel suite of the Countess of Morcar. John Horner, a plumber and a previously convicted felon, is soon arrested for the theft. Despite Horner's claims of innocence, the police are sure that they have their man. Horner's record, and his presence in the Countess's room where he was repairing a firep…