The trial of Mary Queen of Scots began at Fotheringhay Castle in --- RECORDSEPARATOR --- Northamptonshire 418 years ago, on October 14, 1586. Mary was --- RECORDSEPARATOR --- accused of plotting to murder her cousin, the queen of England, --- RECORDSEPARATOR --- Elizabeth I. The evidence against her centred on a letter Mary had --- RECORDSEPARATOR --- sent to one of her supporters. This letter was written in a secret --- RECORDSEPARATOR --- code – its contents supposedly safe from prying eyes. --- RECORDSEPARATOR --- Unfortunately for Mary, however, the code had been cracked by --- RECORDSEPARATOR --- Elizabeth’s top secret agent. And what it revealed would be --- RECORDSEPARATOR --- enough to send Mary to the executioner’s block!