Christie’s lot notes have this biographical sketch. "Born Marie Clothilde Russell, Mrs Guinness was the daughter of Sir George Russell, 4th Baronet. She married the Hon. Arthur Ernest Guinness, the second son of the first Earl of Iveagh. Dressed in the emerald green of her husband's native Ireland, she sat to the leading portraitist of the day: Frank Dicksee was later knighted and became President of the Royal Academy.
Few portraits better capture the confidence and opulence of the Edwardian era. Painted on a magnificent scale, and presented in its original swept and gilded frame, it was justly celebrated when exhibited at the Royal Academy in 1912.”