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More than a century after first emerging into the fogbound, gaslit streets of Victorian London, Sherlock Holmes is universally recognizable. And yet many of his most recognizable features don't appear in Arthur Conan Doyle's original stories. So who exactly is Sherlock Holmes? Who's the real "great detective," and where do we find him? Neil McCaw traces the evolution of Sherlock.

Lesson by Neil McCaw, animation by Lasse Rützou Bruntse.