Count Negretto Sylvius

Count Negretto Sylvius trying to kill Sherlock Holmes (The Strand Magazine, october 1921)

Fictional character.

In the Sherlock Holmes stories

• Count Negretto Sylvius was a wealthy-seeming "Count" and big-game shot who was a violent criminal tied to the theft of the Mazarin stone, and the man Sherlock Holmes expected may murder him (MAZA 93).

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