Lady Dawkins article in thepeerage is here.
The original caption is, "Hamilton, Gavin; Lady Juliana Dawkins (1735-1821); National Trust, Penrhyn Castle; http://www.artuk.org/artworks/lady-juliana-dawkins-17351821-102354.”
A young Lady Juliana poses wearing wavy hair with a ribbon headdress and a row of pearls. Her very full sleeves are visible under her wrap.
Keywords: Hamilton-Gavin, Juliana Colyear, Juliana Dawkins, wavy coiffure, cap, jeweled headdress, bodice, square décolletage, modesty piece, fichu, bows, full sleeves, wrap