Lavinia Spencer by Sir Joshua Reynolds. Probably 1780s.
In keeping with the season here are some pictures of 18th century ladies dressed for winter.
I think this is from the late 1780s.
1778. The cap is called baigneuse.
Mary Robinson by Romney. 1780s
Elizabeth Farren by Sir Thomas Lawrence. 1790.
Madame Mole Raymond by Vigée Le Brun. 1787.