Mary Moders, alias Stedman, a notorious impostor, who pretended to be a German princess. Her arrival as the German princess “at the Exchange Tavern, right against the Stocks betwixt the Poultry and Cornhill, at 5 in the morning … ., with her marriage to Carleton the taverner’s wife’s brother,” are incidents fully narrated in Francis Kirkman’s “Counterfeit Lady Unveiled,” 1673 (“Boyne’s Tokens,” ed. Williamson, vol. i., p. 703). Her adventures formed the plot of a tragi-comedy by T. P., entitled “A Witty Combat, or the Female Victor,” 1663, which was acted with great applause by persons of quality in Whitsun week. Mary Carleton was tried at the Old Bailey for bigamy and acquitted, after which she appeared on the stage in her own character as the heroine of a play entitled “The German Princess.” Pepys went to the Duke’s House to see her on April 15th, 1664. The rest of her life was one continued course of robbery and fraud, and in 1678 she was executed at Tyburn for stealing a piece of plate in Chancery Lane.
This text comes from a footnote on a diary entry in the 1893 edition edited by Henry B. Wheatley.