Michael O'Neill is a Professor of English at Durham. His recent publications include The All-Sustaining Air: Romantic Legacies and Renewals in British, American, and Irish Poetry (2012), The Cambridge History of English Poetry, ed. (2010) and The Oxford Handbook of Percy Bysshe Shelley, co-ed. (2013). His research has concentrated on questions of literary achievement and of poetic influence, dialogue and legacy.