Mickey Finn was a waterfront bar owner in San Francisco durning the California gold rush. Sailors would jump ship and head for the gold fields leaving the ships short handed.
Being a enterprising fellow he would slip "knock out drops" (a Mickey Finn or "Mickey" )in customer drinks and "Shanghi" them. Ship captains would pay a fee for each hand he delivered. Shanghi being a term used as many of the ships left San Francisco and headed for the China trade. Many saliors woke up with a bad hangover on a "Slow Boat to China" (thats a song)
Richard Henry Dana wrote a classic titled "TWO YEARS BEFORE THE MAST" A Personal Narrative of his life at sea after a Mickey Finn event
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