Spies and Secrets
16 videos • 1,509 views • by Letterlocking videos A growing collection of secret writing techniques such as invisible inks, used by 17th-century female spies. A collaboration between Dr Nadine Akkerman, Leiden University, Jana Dambrogio, Thomas F. Peterson (1957) Conservator, MIT Libraries, and MIT Video Productions (MVP). #SpiesAndSecrets #SecretWritingTechniques