POMPEO BATONI (1708-1787) Augustus Henry FitzRoy, 3rd Duke of Grafton (1762) Oil on canvas (76 x 61 cm) National Portrait Gallery, London Augustus Henry FitzRoy, 3rd Duke of Grafton (1735-1811), styled Earl of Euston between 1747 and 1757, was a British Whig statesman of the Georgian era. He was one of the very few dukes …