When our visitor had disappeared, Sherlock Holmes's movements were such as to rivet our attention. He began by taking a clean white cloth from a drawer and laying it over the table. Then he placed his newly acquired bust in the centre of the cloth. Finally, he picked up his hunting-crop and struck Napoleon a sharp blow on the top of the head. The figure broke into fragments, and Holmes bent eagerly over the shattered remains. Next instant, with a loud shout of triumph he held up one splinter, in which a round, dark object was fixed like a plum in a pudding.

"Gentlemen," he cried, "let me introduce you to the famous black pearl of the Borgias."

Six Napoleons