In London, the Prior of the Charter house, John Houghton, and other
Carthusian monks are found guilty of treason, since they refuse to
acknowledge the royal supremacy in contravention of the authority
of the Pope. On 4th May, they are executed at Tyburn.
Citation:
Editors. "Carthusian monks are found guilty of treason".
The Literary Encyclopedia. First published 01 November 2010
[http://www.litencyc.com/php/stopics.php?rec=true&UID=14539, accessed 22 May 2013.]