The Nuttall Encyclopedia
An alliance formed in 1719 between England, France, Austria, and Holland to secure the thrones of France and England to the reigning families, and to defeat the schemes of Alberoni to the aggrandisement of Spain.
Wood, James, ed. Entry for 'Quadruple Alliance'. The Nuttall Encyclopedia. https://www.studylight.org/encyclopedias/eng/nut/q/quadruple-alliance.html. Frederick Warne & Co Ltd. London. 1900.