On 26 February, 1752, Lady Liddell married Whig politician Charles Watson-Wentworth.[1] They were married until Watson-Wentworth's death on 1 July 1782.
She was acknowledged as a skilled politician by contemporaries, with opposition party members sometimes directing their letters straight to her.[3] She was described by herself and others as Rockingham’s "secretary", but Rockingham called her "My Minerva at my elbow."[4] After Rockingham’s death, her correspondent Edmund Burke wrote to her, "Your Names indeed ought to go down together; for it is no mean part you have had in the great services which that great and good man has done to his Country."[5]
Lady Rockingham was the owner of Rockingham Mantua, a silk satin mantua brocaded in silver thread with silver lace trim. It is thought that the Mantua was part of a matching set with her husband. Lady Rockingham mentioned the sets in her letters "Lord Stormont says being in your dress is quite bourgeois, but I hope you will approve of it, I shall take it monstrous if you don't, for I mean it as a compliment to you".
The widowed Lady Rockingham settled at Hillingdon House, Middlesex, in 1785, where she died in 1804 and was buried with her husband at York Minster.[3]
^Chalus, E (1998) '"'My Minerva' at my elbow" - the political roles of women in 18th-century England.' In: Taylor, S, Connors, R and Jones, C, eds. Hanoverian Britain and empire: essays in memory of Philip Lawson. Boydell Press, Suffolk. ISBN 0851157203. p. 227.
^The Correspondence of Edmund Burke, ed. T. W. Copeland and others, 10 vols. (1958–78), 5.46.