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First defined by the 1352 Treason Act, treason was the worst crime you could commit. Records held at the National Archives detail centuries of treasonous plots and traitors, described in statute rolls, legal records, and state papers.

Record revealed The Monteagle Letter

Read about The Monteagle Letter

Is this the most famous anonymous letter in British history? Perhaps it should be. Without it, the Gunpowder Plot might have succeeded.