Editors. "Perkin Warbeck publicly confesses his treason and is imprisoned". The Literary Encyclopedia. First published 01 November 2010
[http://www.litencyc.com/php/stopics.php?rec=true&UID=13994, accessed 21 May 2013.]
Perkin Warbeck, who had attempted to flee from Henry VII's court, publicly confesses to treason in both London and Westminster and is imprisoned in the Tower.