Formally the Treaty of Dover, signed on 31 December 1670 (21 December OS) established a military alliance between England and France against the United Provinces of the Netherlands. Informally, Charles II and Louis XIV also concluded a secret treaty on 1 June 1670 (22nd May OS) according to which Charles II would work for the conversion of England to Roman Catholicism and would receive £200,000 immediately and £300,000 p.a. to fund the expenses of the Dutch war. Charles also agreed to support Louis's claim to the Spanish succession.
Louis' financial support gave Charles the ability to operate independently of Parliament; Charles fulfilled his commitment to Louis by lifting penalties on Catholics and by converting to …
Editors. "Anglo-French Treaty of Dover". The Literary Encyclopedia. First published 06 October 2004
[http://www.litencyc.com/php/stopics.php?rec=true&UID=2618, accessed 30 March 2017.]