Editors. "Treaty of Herrenhausen (or Hanover) between Britain, France and Prussia". The Literary Encyclopedia. First published 01 April 2011
[http://www.litencyc.com/php/stopics.php?rec=true&UID=17297, accessed 21 May 2013.]
Britain, France and Prussia sign the Treaty of Herrenhausen (or Hanover). This guarantees Prussia's claim to Jülich-Berg and is designed to counteract the Spanish alliance with the Emperor.