997060 Portrait of a Viscountess, probably Philadelphia Hannah Dawson, Viscountess Cremorne (w/c on ivory) by Cosway, Richard (1742-1821); Private Collection; (add.info.: This portrait miniature is thought to depict Philadelphia Hannah Dawson, Viscountess Cremorne (c.1740-1826), whose grandfather William Penn (1644-1718) founded the American province of Pennsylvania. Philadelphia married Thomas Dawson, 1st Viscount Cremorne, MP (1725-1813) in 1770 becoming Baroness Cremorne, attaining the title of Viscountess later in 1785. ); Photo 穢 Philip Mould Ltd, London; English, out of copyright.