In the late 18th century, no man in Edinburgh seemed more respectable than William Brodie. By day, he was a successful cabinetmaker, a member of the city council, and a deacon of the Incorporation of Wrights and Masons, one of the most prestigious tradesmen's guilds in Scotland. But by night, Brodie led a secret life as a burglar and thief, moving through the dark streets of the city with the same keys and skills that had earned him the trust of its wealthiest citizens.

His extraordinary double life eventually ended at the gallows. A century later, Brodie’s life inspired one of literature's most famous tales of dual identity: Robert Louis Stevenson's The Strange Case of Dr. Jekyll and Mr. Hyde.

On November 9, 1963, two investigators from France’s Central Office for Counterfeit Currency Control (OCRFM) arrived at the post office on Rue Turgot in Paris’s 9th arrondissement. Five days earlier, a customer had purchased 1,000 francs’ worth of Treasury bonds there using a stack of crisp 100-franc notes bearing the portrait of Napoleon Bonaparte. At first glance, nothing seemed unusual. The notes looked authentic, felt authentic, and even carried convincing watermarks. But they were counterfeit.

A 'Bonaparte' 100 Franc notes that Ceslaw Bojarski forged. Credit: Wikimedia Commons