The Somerville Plot, which planned to assassinate Elizabeth I is
discovered, and its originator, John Somerville, is executed on
20th December.
Citation:
Editors. "The Somerville Plot to assassinate Elizabeth I is discovered".
The Literary Encyclopedia. First published 01 February 2011
[http://www.litencyc.com/php/stopics.php?rec=true&UID=15291, accessed 26 May 2013.]