Her article in thepeerage is here.
From artsy.net-artwork-thomas-lawrence-sir-thomas-lawrence-p-dot-r-a-dot-miss-harriet-clements.
White dresses were a symbol of wealth because laundering was not a simple proposition in 1805. Otherwise Harriet Clements' dress in this 1805 Lawrence portrait is very plain and simple.
Keywords: 1805, Lawrence, Harriet Clements, Harriet Moore-Hodder, Clements family, Moore-Hodder family, British, straight coiffure, head band, square décolletage, quarter length close sleeves, Empire waistline, close skirt, bracelets, wrap