New Technique Reveals Centuries of Secrets in Locked Letters The New York TimesRare 'locked' letter sealed 300 years ago is finally opened virtually CNN A Letter Sealed for Centuries Has Been Read—Without Even Opening It The Wall Street JournalResearchers read sealed 17th-century letter without opening it The GuardianHigh-Tech Scan Peeks Inside Sealed Letters From The Renaissance NPRView Full Coverage on Google News