"The Adventure of the Blue Carbuncle" is one of the 56 short story cases of Sherlock Holmes written by Sir Arthur Conan Doyle. It is the seventh story of twelve in The Adventures of Sherlock Holmes. The story was first published in The Strand Magazine in January 1892. In the story, on Christmas Eve, Sherlock Holmes and Dr John Watson try to determine how a fabulous blue carbuncle found its way down the gullet of a goose.