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Researchers Use X-Ray Tech to Unravel Centuries-Old Secrets Hidden in Locked Letters Courtesy of the Unlocking History Research Group Archive Subscribe Sputnik International https://sputniknews.com/science/202103031082239260-researchers-use-x-ray-tech-to-unravel-centuries-old-secrets-hidden-in-locked-letters/ Letterlocking is considered a centuries-old technique in which an individual intricately folds a piece of correspondence in order to safeguard the contents from any eagle-eyed snooper. The practice was even tapped by Mary, Queen of Scots, who protected the contents of an 1587 letter to h...

Your emails might become historical evidence in a few centuries!

A signed, sealed but not delivered letter from 1697 has finally been read with the help of a high-tech scan that looked inside without breaking its seal.