Theodora Grahn was born in the early 1740s in either
Leipzig or
Berlin, the only child of architect
Johann Friedrich Grael and Loysa Sophia (née Kiesewetter). After the deaths of his parents, he moved to Berlin to live with his aunt. He learned mathematics, French, English and Italian. Following her death, he started working as an exchange broker, a profitable profession during the
Seven Years' War. He made daily outings to
counting houses in various parts of the city and wore boots during the dirtier weather. By the conclusion of the war in 1763, he had doubled his money.
Work for Johann Bernhard Basedow Around 1763, he moved to
Bayreuth and by 1768 was living as a man, dressed as a huntsman and styling himself the Baron John de Verdion. In 1769 he worked for German educational reformer
Johann Bernhard Basedow as an
amanuensis and secretary. It was suspected that de Verdion was not a man and rumours circulated about the nature of the relationship between the pair. Baselow himself was not convinced that de Verdion was a woman, but an ensuing scandal obliged him to dismiss de Verdion from his employ. In 1770, some young men from the counting house of a merchant concocted a plan to determine de Verdion's sex. They invited him to an inn and plied him with drinks. Once he was drunk, they assaulted him, tore off his clothes, and "verified her sex beyond all possibility of doubt". ==Life in London==