Existing comment:
Passing Notes... Among Notes!
American entertainer Josephine Baker was a celebrity in Paris. She was also an agent for French intelligence. How did she smuggle information to the Allies? On sheet music like this.
Concealed among the musical notes were other notes -- in invisible ink -- about German military strategies and troop movements. While helping the French Resistance, Baker even hid messages in her underwear.
Sheet music, France, 1928 |