Her Wikipedia article is too brief and concentrates on her service in Queen Victoria's court. She was apparently an anti-slavery activist. She is not the same Duchess of Sutherland who forced farmers from her land to replace with sheep, that was her mother-in-law.

1838 The Duchess of Sutherland in her Coronation Robes by Charles Robert Leslie (Wolverhampton Art Gallery, West Midlands UK)

Harriet, Countess Gower and her Daughter, Elizabeth Georgiana, later Duchess Of Argyll after Sir Thomas Lawrence (auctioned)
