Philip Mould has good notes for this portrait here.
The Countess of Northumberland is pensive wearing a golden brown dress with white chemise in this 1668 Lely.
Keywords: 1668, Lely, Elizabeth Wriothesley, Wriothesley family, Percy family, Countess, British, curly coiffure, scoop neckline, modesty piece-bertha, elbow length puffed sleeves, slashed sleeves, cuffs, chemise, full skirt, clasps