XIR170479 Portrait of George Berkeley (1685-1753) Bishop of Cloyne, engraved by Thomas Cook (1744-1818) c.1781 (engraving) by English School, (18th century); Bibliotheque Nationale, Paris, France; (add.info.: British Ambassador to the King of Sicily; \'A New Theory of Vision\'; \'Three Dialogues between Hylas and Philonous\'; argued that the material world exists only in being perceived by the mind;); English, out of copyright.