"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 The Strand Magazine in January 1892. Plot As London prepares for Christmas, newspapers report the theft of a near-priceless gemstone, the "Blue Carbuncle", from the hotel suite of the Countess of Morcar. The police arrest John Horner, a plumber with a criminal record who was in Countess's room repairing a fireplace grate. In Baker Street, Watson finds Holmes contemplating a battered old hat brought to him by Peterson, a commissionaire, who seeks Holmes's help in returning the hat to its rightful owner, along with a Christmas goose. Both had been dropped in the street during a scuffle. Although the goose bears a tag with the name Henry Baker, there is little hope of finding an owner with such a common name. Peterson takes the goose home for dinner, and Holmes keeps the hat to study as an intellectual exercise. Peterson returns excited, carrying the stolen gem, and reports that he found it in the goose's crop. Holmes closely studies the hat and its condition, deducing Henry Baker's age, social standing, intellect, and domestic status. When Baker appears in response to advertisements that Holmes places in the London newspapers, Holmes offers him a new goose. Happily accepting the replacement bird, Baker declines to take away the original bird's entrails, convincing Holmes that he knew nothing about the gem. He tells Holmes that he had purchased the goose at the Alpha Inn, a pub near the British Museum. Holmes and Watson visit the pub, where the proprietor informs them that the bird was purchased from a Covent Garden dealer. The dealer there refuses to help, complaining of the pestering he has endured recently about geese purchased by the Alpha Inn. Holmes, realising that he is not the only one aware of the goose's importance, tricks the irate man into revealing that the bird was supplied to him by its breeder, Mrs Oakshott of Brixton. A trip to Brixton proves unnecessary when the dealer's other "pesterer" appears – James Ryder, head attendant at the hotel where the gem was stolen. Back in Baker Street, Ryder admits that he and his accomplice, the Countess's maid, had contrived to frame Horner, believing that his criminal past would