By Charles Bretherton, 1782, via the British Museum. 

(Thanks to sew18thcentury.com for posting this!)

missfolly:

Portrait of Jane Maltass (Mrs. Baldwin) (detail) by Sir Joshua Reynolds, 1782

Very interesting turban!  I wonder if they had some connection to the Eastern world or if this is just showing the popular Turkish influence of the time.  (And look at that necklace- drool!)