Editors. "Death of Père Joseph, Richelieu's secret agent". The Literary Encyclopedia. First published 01 February 2011
[http://www.litencyc.com/php/stopics.php?rec=true&UID=16137, accessed 18 April 2014.]
François Leclerc du Tremblay, Richelieu's secret agent known as Père Joseph, dies soon before he is due to be promoted to the rank of cardinal.