Artist and author, born at Plymouth; studied painting in London and in Paris; produced the last portrait of Napoleon, which he executed from a series of sketches of the emperor on board the Bellerophon in Plymouth harbour; he travelled in Greece, and from 1816 to 1830 made his home at Rome; "Christ Weeping over Jerusalem," his greatest work, appeared in 1841; was President of the Royal Academy; wrote several works on subjects relating to his art, and translated Goethe's "Farbenlehre" (1793-1865).