Her article in thepeerage is here.
From Wikimedia.
This portrait of Emilia Olivis St. George is dominated by her towering coiffure that is almost as tall as her head. Her dress is simple.
Keywords: Hamilton, Emilia Olivia St. George, Duchess of Leinster, Duchess, British, high straight coiffure, modesty piece, square décolletage, split bodice, tight sleeves