If you’re looking for a quintessential British scandal, the story of Margaret Campbell—the so-called “Dirty Duchess”—is hard to beat. Long before she wed the Duke of Argyll, her name was already circulating through the upper tiers of society. But it was the explosive fallout from their divorce that cemented her place in the nation’s gossip lore. One thing was certain: the Duchess had a secret lurking in her past that would shock everyone.