The “Petticoat Duel” was so-called because this late 18th century duel apparently took place between two women – Lady Almeria Braddock and Mrs Elphinstone.
The story goes that the duel, which reportedly took place in 1792, came about after, during a social visit to Lady Braddock’s home, Mrs Elphinstone suggested the aforementioned lady was much older than her 30-odd years. It was clearly a sensitive subject and Lady Braddock demanded satisfaction via a duel.
The two women met in Hyde Park and initially exchanged pistol shots, the only casualty being Lady Braddock’s hat. Swords were then drawn and the women crossed blades until Mrs Elphinstone received a minor wound to her arm.
Following her wounding, Mrs Elphinstone wisely decided to apologise to Lady Braddock for doubting her age (she apparently wrote a lengthy apology later on) and the women put down their weapons. Crisis averted.
Despite the many times the story of the “Petticoat Duel” has been repeated, however, there’s some considerable doubt over whether it actually took place.
The key source appears to be an article in a 1792 edition of Carlton House Magazine and it has been suggested that “Lady Almeria Braddock” may be an invented character perhaps based partly on Georgian actress George Anne Bellamy.
So we apologise for any who have felt misled, for this “moment” may actually be no more than a creative writer’s story. But, whether true or not, it does make for an interesting tale.