Editors. "Duke of Wellington challenges Earl of Winchilsea to a duel". The Literary Encyclopedia. First published 30 December 2011
[http://www.litencyc.com/php/stopics.php?rec=true&UID=17918, accessed 19 June 2013.]
The Duke of Wellington challenges the Earl of Winchilsea to a duel, after the latter's criticism of his support for the lifting of legal constraints on Catholics.