Éon, Charles-Geneviève de Beaumont, Chevalier d'. (1728–1810) Autograph LetterAutograph Letter in the hand of the 18th century French diplomat, spy, and soldier who lived openly as a man and as a woman in France and England at different stages of life, drawing much public interest, and who infiltrated the court of Empress Elizabeth of Russia by presenting as a woman. June 29, 1765. 1 pp. Extract copied in the hand of the Chevalier d'on, from an original letter addressed to him from Victor Franois, 2nd duc de Broglie (17181804),