Advent Calendar: Sherlock Holmes

Doyle was not overly sentimental about Christmas when writing the Sherlock Holmes stories, but he did set one just after the holiday, "The Adventure of the Blue Carbuncle", available here as a Project Gutenberg e-text (as part of the collection "The Adventures of Sherlock Holmes"), and here as a Librivox audiobook recording (part 1, part 2) by Ruth Golding.

Slightly more recently, the long-running Sherlock Holmes radio shows did occasionally include a Christmas special, such as this one, "The Night Before Christmas", part of the archive of the show happily available in the public domain.