The Adventure of the Six Napoleons

Someone is destroying small busts of Napoleon Bonaparte. At first merely a nuisance, vandalism quickly turns to murder after one of the statue owners finds a dead man on his doorstep beside a smashed statue. Reasoning his way back to the source of the statues, Holmes determines that there is more to this case than just antipathy towards the great French leader. Can Holmes and Watson solve the mystery before the bust buster strikes again?