According to her article in thepeerage, she married John Savile to become Countess of Mexborough of Longford. They had seven children who survived to adulthood. According to Wikipedia, Mexborough is a town in the Metropolitan Borough of Doncaster in South Yorkshire, England. It lies on the estuary of the River Dearne.
From forum.artinvestment.ru/blog.php?b=270065&langid=5. Also posted to the Revolutionary, Napoléonic, and Romantic Era Album here.
Lady Anne’s dress features a wide gold-colored sash.
Keywords: 1812, Lawrence, Anne Yorke, Viscountess Pollington, Countess of Mexborough, York family, Savile family, Viscountess, Countess, British, wavy coiffure, kotted chignon, earrings, Empire bodice, off shoulder sweetheart neckline, floral bodice ornament, wasit sash, close skirt, wrap, lining