He is the author of Bonnard (1994) and What is Painting? Representation and Modern Art (1999), and is a regular contributor to the Times Literary Supplement, Modern Painters and the Guardian.
"The mirror, above all - the mirror is our teacher," wrote Leonardo da Vinci. Portraits are an endless source of fascination, responding as they do to the basic human impulse to look at faces and try to see into the...
