
You watch Holmes take his cocaine and pick a fight about your own account of his cases, until a family watch under his lens turns deduction into a wound neither of you meant to open. He apologizes, then a client arrives: Mary Morstan, whose father vanished ten years ago after returning from India, and who has since received one unexplained pearl every year — until today's letter, which offers no pearl, only an invitation to meet its sender tonight. Holmes takes the case, and a stranger's carriage is already waiting.
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