"The Adventure of the Mazarin Stone" is one of 12 Sherlock Holmes short stories by Arthur Conan Doyle in The Case-Book of Sherlock Holmes. It was first published in the Strand Magazine October 1921. Watson arrives at 221B Baker Street where the page boy Billy shows him a wax effigy of Holmes placed near a curtained window in the sitting room. The effigy produces a shadow on the curtain that, when viewed from outside, is the unmistakable profile of...