His Duchess was in the following year tried before the House of Lords for bigamy, found guilty, but, pleading benefit of peerage, was discharged.

Thus, she carried out the prognostication of Lord Chief Justice Mansfield, who had opposed the prosecution.

"The arguments about the place of trial suggest to my mind the question about the propriety of any trial at all," he said in a debate in the House of Lords.

"_Cui bono_?
What utility is to be obtained?
Suppose a conviction to be the result ?--the lady makes your lordships a courtesy, and you return a bow." She survived, living on the continent, until 1788.

As an epitaph for her there can be nothing better than a remark of Horace Walpole: "I can tell you nothing more extraordinary, nor would any history figure near hers.