As Sherlock Holmes hits two major anniversaries, take our quiz to see how much you know about the world's most famous fictional sleuth.
The first ever Sherlock Holmes story, A Study in Scarlet, was published 130 years ago, in the November 1887 edition of the long-defunct Beeton’s magazine.
Arthur Conan Doyle had based his character on a doctor he’d met during his medical training, and the writer was still working as a GP in Southsea when he got the story published.
It didn’t make much of a splash, initially, but was successful enough that the story was later published in book form, and Conan Doyle began to have a few more stories accepted – notably by Strand magazine, where the great detective at 221b Baker Street first came to prominence.
And it was a collection of those Strand stories which propelled Sherlock Holmes into a global phenomenon. The Adventures of Sherlock Holmes collected 12 short stories together, and was published 125 years ago on 14 October 1892.
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To mark these two anniversaries we have 25 questions all about the world’s most famous sleuth – take the test, and share your result with your friends.
Your quizmaster is Tim Symonds, author of five Sherlock Holmes novels – the latest of which, Sherlock Holmes And The Nine-Dragon Sigil, is out now.