The Huguenots tried to carry out the 'Plot of Vincennes'. The
purpose of this conspiracy was to rescue Henry of Navarre and the
Duke of Alençon, the King's younger brother and a Protestant
sympathiser, from the French Courts, but it failed.
Citation:
Editors. "Failed attempt to rescue Alençon and Navarre from the French court".
The Literary Encyclopedia. First published 01 February 2011
[http://www.litencyc.com/php/stopics.php?rec=true&UID=15168, accessed 19 May 2013.]