Baron Maupertuis is a man Sherlock Holmes became involved with in Serbia. In Sherlock's efforts to dismantle Jim Moriarty's criminal network, he was involved in a scheme of Sherlock's.


Baron Maupertuis was mentioned in the Sherlock episode The Empty Hearse.

He has also appeared in the Memoirs of Sherlock Holmes, ' The Reigate Puzzle'.

He appeared in The Young Sherlock book series twice, first in Death Cloud and second in Knife Edge.

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