In a steady, stately script, an anonymous Dutch writer living around 1700 wrote a letter: “I never thought you’d be such a miserable dog,” it went. “If you’ve got something to say, just say it to my ...

Recent research highlights the use of letterlocking techniques by Queen Elizabeth, Catherine de’ Medici and Mary Queen of Scots. By William J. Broad To safeguard the most important royal ...

Before envelopes existed, cleverly folding up a letter was a crucial privacy tactic. Only now are we learning what those techniques were, and what they reveal about cultures around the world. Imagine ...

A rare unopened example of a letterpacket with a paper lock. This locking mechanism was used since the 1500s, but until now, only opened and “unlocked” examples had been seen in archival collections.

Over recent years we’ve been treated to a series of fascinating advances in the world of x-ray imaging, as researchers have developed their x-ray microtomography techniques and equipment to the point ...

Keys: How to Use this Book -- Introduction to Letterlocking -- Building the Story of Letterlocking -- Reading Letterlocking Features -- Locking Mechanisms, Security, and Authentication -- Distinctive ...