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 To continue reading this article you need to purchase a subscription, available from only £5. Start my trial subscription now 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.