As far as popular entertainment goes, we modern folk can have rather nineteenth century tastes. Our love of vampires can be traced to the vision of Bram Stoker. Our Christmas traditions are heavily indebted to the stories of Charles Dickens. Sherlock Holmes—kept alive by a menagerie of TV shows, films, memorabilia, and readers—is no different. But what is it about Sir Arthur Conan Doyle’s famous character that endures so well?