Amy Elizabeth Thorpe

Amy Elizabeth Thorpe, codename "Cynthia," was born in Minneapolis on November 22, 1910. After Arthur Pack, second secretary at the British Embassy and the man with whom she'd had an affair, was transferred to Madrid on the eve of the Spanish Civil War, Amy Pack helped smuggle Nationalists to safety, transported Red Cross supplies to Franco's forces, and coordinated evacuations and worked in diplomatic affairs.

In 1937, Amy Pack was recruited by the British Intelligence to gain political information from an aide to a foreign minister, from whom she learned of the 'Ultra Secret' — that Polish experts were aware of a threat posed by Germany's Enigma enciphering machine. Pack also gained proof of Hitler's plans to dismember Czechoslovakia.

When World War II started, Amy Pack left her husband and sailed to New York, where she worked for the U.S. Office of Strategic Services. During her time in the U.S., Thorpe obtained the Italian naval cryptosystem and the Vichy ciphers, both of which were used to great effect by the Allies. After the war ended, on December 1, 1963, Amy Thorpe Brousse died due to mouth cancer.