Editors. "Duke of Norfolk is tried for treason". The Literary Encyclopedia. First published 01 February 2011
[http://www.litencyc.com/php/stopics.php?rec=true&UID=15134, accessed 24 April 2014.]
Thomas, Duke of Norfolk, is tried for treason for his complicity in the Ridolfi conspiracy to assassinate Elizabeth I and place Mary Queen of Scots on the throne, and found guilty. He is executed on 2nd June.