How do you become a Lady of rank if not born that way? The answer is simple if you're pretty. She was "associated" with Admiral Horatio Nelson after being married at the age of 26 to Sir William Hamilton who was British Envoy to the Kingdom of Two Sicilies and aged 60 when she met Nelson. Her Wikipedia article, with links to numerous pictures of her in theatrical dress, is here.
Lady Hamilton wears a scarf that encloses her entire neck and a dress without a separate bodice in this 1800 Schmidt portrait.
Keywords: 1800, Schmidt - Johann, Amy Lyon, Emma Hart, Lady Hamilton, Hamilton family, British, mistress, Sir Harry Featherstonhaugh, Charles Francis Greville, Admiral Horatio Nelson, curly coiffure, high enclosing neckline, scarf, waist band, Empire waistline, close skirt, order bows, wrap