A legendary rivalry existed between the two megastars of nineteenth-century French painting: the arch-Romantic Eugène Delacroix (1798-1863)—the subject of an exhibition now at the Metropolitan Museum, through November 12—and the inveterate classicist Jean-Auguste-Dominique Ingres (1780-1867).1 But on one thing they agreed: Drawing is the essential foundation of art. As Ingres famously declared, “Drawing is the probity […]