Horace Walpole, a notable writer and politician, had an intriguing encounter with Mademoiselle la Chevalière d'Éon, a figure famous for her unconventional lifestyle as a transvestite diplomat and spy. At a gathering hosted by the Cosway family, she was seen instructing guests in the art of fencing, showcasing her unique blend of skills and qualities that captivated the society of her time.

This moment illustrates not only her remarkable versatility but also the acceptance and curiosity towards non-traditional identities in the 18th century. D'Éon's ability to engage in such activities at social events emphasizes the fluid nature of gender roles during that era and highlights her prominent place in the cultural landscape of her period.