Tim Barringer is Paul Mellon Professor of the History of Art at Yale University. Edith Devaney is a curator at the Royal Academy of Arts, London, and co-curator of ‘David Hockney: A Bigger Picture’. Margaret Drabble is an author and novelist. Martin Gayford is a writer and chief art critic for Bloomberg News. He is the author of acclaimed books on Van Gogh, Constable and Lucian Freud, as well as A Bigger Message: Conversations with David Hockney, also published by Thames & Hudson. Marco Livingstone is an art historian and an independent curator. He is co-curator of ‘David Hockney: A Bigger Picture’ and the author of numerous publications on the artis. Xavier F. Salomon is Curator of Southern Baroque in the Department of European Paintings at the Metropolitan Museum of Art, New York.