Amy Elizabeth Thorpe was born on November 22, 1910, in Minneapolis, Minnesota. Her father was George C. Thorpe, a distinguished U.S. Marine Corps officer. On April 29, 1930, Thorpe married Arthur Pack, nineteen years older and a second secretary at the British embassy in Washington. The Packs lived in Chile, Spain, and Poland for Arthur's job. She was recruited as by the British Secret Intelligence Service after passing on information garnered from an affair she had with a politically connect Pole in 1938. During World War II Pack worked on ciphers and espionage for the British Security Coordination and the American Office of Strategic Services.
Throughout her work in Washington, Pack was under surveillance by the FBI as she was suspected of being a foreign agent which in fact she was, working for the British BSC as well as the American OSS. After her estranged husband, Arthur Pack, killed himself in 1945, Pack married Charles Brousse. The couple lived quietly in France until her death from throat cancer on December 1, 1963.
