A Letter Sealed for Centuries Has Been Read—Without Even Opening It The Wall Street JournalRare 'locked' letter sealed 300 years ago is finally opened virtually CNN New Technique Unfolds Centuries of Secrets in Locked Letters The New York TimesSecrets of sealed 17th century letters revealed by dental X-ray scanners EurekAlertSealed letter from the 17th century has been read for the first time WITHOUT opening it Daily MailView Full Coverage on Google News