Belle Boyd became famous during the American Civil War for her work as this.
Battlefield nurse
Spy
Investigative journalist
Abolitionist
Spy. She began her work for the Confederacy at age 17. Her exploits became legendary, although it is likely they are exaggerated. Boyd was aboard a Confederate spy ship that was captured by the Union. She was held prisoner by the commander of the Union ship, whom she later married. After his death, she married another former Union officer.