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X-rays unfold 'locked' 300-year-old secret letters without opening them

People doubled letters as envelopes to ensure the security of a document, but today we can access them without anyone knowing any better. ....

Jacques Sennacques , Queen Mary University Of London , Queen Mary University , Pierre Le Pers , Daniel Le Pers ,

Scientists read 300-year-old sealed letter without opening it


Scientists read 300-year-old sealed letter without opening it
Virtual unfolding allows researchers to look inside intricately folded historical letters without damaging them.
Scientists are using technology to read centuries-old letters sealed using letterlocking.
Nature Communications
In a letter, dated July 31, 1697, Jacques Sennacques asks his cousin Pierre Le Pers, a French merchant in The Hague, for a certified copy of a death notice for Daniel Le Pers. That s no revelatory request by any means, but for the past 300 years, the letter has remained sealed away, its contents unseen. 
Now, thanks to a technique that let scholars peek inside virtually without damaging the intricately folded historical document, Sennacques request has been uncovered. The new technique could hold promise for unlocking sealed correspondence containing historical gems across time and place. ....

Champagne Ardenne , United Kingdom , City Of , Jana Dambrogio , Amanda Ghassaei , Thomasf Peterson , Jacques Sennacques , King College London , Nature Communications , Pierre Le Pers , Enlarge Image , Vatican Secret Archives , College London , Brienne Collection , Prize Papers , Sci Tech , ஒன்றுபட்டது கிஂக்டம் , நகரம் ஆஃப் , கிங் கல்லூரி லண்டன் , இயற்கை தகவல்தொடர்புகள் , பியர் லெ பர்ஸ் , வத்திக்கான் ரகசியம் காப்பகங்கள் , கல்லூரி லண்டன் , பிரையன் சேகரிப்பு , ப்ரைஸ் ஆவணங்கள் , அறிவியல் தொழில்நுட்பம் ,