The Adventure of the Six Napoleons

"The Adventure of the Six Napoleons", one of the 56 Sherlock Holmes short stories written by Sir Arthur Conan Doyle, is one of 13 stories in the cycle collected as The Return of Sherlock Holmes.
Inspector Lestrade of Scotland Yard brings Holmes a mysterious problem about a man who shatters plaster busts of Napoleon. One was shattered in Morse Hudson's shop, and two others, sold by Hudson to a Dr. Barnicot, were smashed after the doctor's house and branch office had been burgled. Nothing else was taken. In the former case, the bust was taken outside before being broken.
Holmes knows that Lestrade's theory about a Napoleon-hating lunatic must be wrong. The busts in question all came from the same mould, when there are thousands of images of Napoleon all over London.
The next day, Lestrade calls Holmes to a house where there has been yet another bust-shattering, but there has also been a murder. Mr. Horace Harker found the dead man on his doorstep after investigating a noise. His Napoleon bust was also taken by a burglar entering through a window. It, too, was from the same mould. Also, a photograph of a rather ape-ish-looking man is found in the dead man's pocket...
Famous works of the author Arthur Conan Doyle: A Study in Scarlet, The Sign of the Four, The Adventures of Sherlock Holmes, The Memoirs of Sherlock Holmes, The Hound of the Baskervilles, The Return of Sherlock Holmes, The Valley of Fear, His Last Bow, The Case-Book of Sherlock Holmes, Stories of Sherlock Holmes, The Lost World.