20th Century

The Cleaning Lady Who Cracked German Codes

While emptying wastepaper baskets in Room 40, a London cleaning lady became one of Britain's most important codebreakers of World War I.

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World War IEspionageCodebreakingWomen's HistoryBritainIntelligence ServicesClass BarriersNaval WarfareZimmermann TelegramWorking Class Heroes

History is full of stories like this one.