Spain and the Holy Roman Empire sign a supplementary Treaty of
Vienna, in which Emperor Charles VI agrees to help Spain regain
Gibraltar, and Spain offers protection for the Ostend Company. Both
treaties are setbacks for French and English discussions at
Cambrai.
Citation:
Editors. "Supplementary Treaty of Vienna".
The Literary Encyclopedia. First published 01 April 2011
[http://www.litencyc.com/php/stopics.php?rec=true&UID=17296, accessed 22 May 2013.]