Editors. "A plot to assassinate Maurice Prince of Orange is discovered". The Literary Encyclopedia. First published 01 February 2011
[http://www.litencyc.com/php/stopics.php?rec=true&UID=15894, accessed 20 May 2013.]
A plot is discovered with the aiming of assassinating Maurice Prince of Orange, which implicates two of Oldenbarneveldt's sons.