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- "We give you best, Holmes. I believe you are the devil himself."
– Neggreto Sylvius to Sherlock Holmes
The Count Negretto Sylvius is the main antagonist of the short-story "The Adventure of the Mazarin Stone" published in October, 1921. He is presented as a half-italian aristocrat, thief and crook, and lunatic as he preaches better manners in a good mood than worse in a bad one.
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Gallery[edit]
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