Valerie Eliot has edited T. S. Eliot: The Waste Land, a Facsimile & Transcript of the Original Drafts (1971) and The Letters of T. S. Eliot, Volume I: 1898-1922 (1988; revised 2009) and Volume II: 1923-1925 (2009). John Haffenden is Emeritus Professor of English Literature at the University of Sheffield, Senior Research Fellow of the Institute of English Studies, University of London, and a Fellow of the British Academy. His publications include a biography of the American poet John Berryman; editions of the works of William Empson including the Complete Poems (2000); and an award-winning two-volume biography of Empson (2005, 2006). He was General Editor of Letters of T. S. Eliot, volumes 1 and 2 (2009).