Born in 1728, French aristocrat Charles d'Eon de Beaumont had served his country as a diplomat, soldier, and spy for fifteen years when rumors that he was a woman began to circulate in the courts of Europe. D'Eon denied nothing and was finally compelled by Louis XVI to give up male attire and live as a woman, something d'Eon did without complaint for the next three decades. Although celebrated as one of the century's most remarkable women, d'Eon was...