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The Dumbbell Cipher
In 1777, British General Sir Henry Clinton sent this message to his fellow officer John Burgoyne…
The Paul Rubin Cipher
On the morning of Jan. 20, 1953, the body of 18-year-old Paul Emanuel Rubin was found at the bottom of a ditch near the Philadelphia International Airport.
A Pirate Cipher
According to legend, when the pirate Olivier Levasseur was hanged in 1730, he flung a necklace into the crowd, crying, “Find my treasure, the one who may understand it!”