History Matters Codes and Crowns Fifty encrypted letters sent by Mary, Queen of Scots have recently been deciphered. What have we learnt? Jade Scott | Published in History Today Volume 73 Issue 4 April 2023 Cipher used between Mary, Queen of Scots and Guillaume de l’Aubespine, Mauvissière’s replacement as ambassador, late 16th century. The National Archives. To continue reading this article you will need to purchase access to the online archive. Buy Online Access Buy Print & Archive Subscription If you have already purchased access, or are a print & archive subscriber, please ensure you are logged in. Please email digital@historytoday.com if you have any problems.