In the M corridor, for example, each name evokes a complex of emotions, a whole private world: Ross MacDonald, Terrence McNally, Bernard Malamud, John Masefield, Edgar Lee Masters, Peter Matthiessen, Somerset Maugham, Emperor Maximilian of Mexico, H. L. Mencken, Arthur Miller, Lady Ottoline Morrell, Christopher Morley. These boxes hold much of what humanity will ever know about their lives.