The Roots of Romanticism, the A. W. Mellon Lectures in the Fine Arts, 1965, ed. Henry Hardy (London, 1999: Chatto and Windus; Princeton, 1999: Princeton University Press; London, 2000: Pimlico)

• excerpted in The Times Literary Supplement on The Romantics ed. Michael Caines and Alan Jenkins (London, 2005: The Times Literary Supplement), 1–2, 125–126
• trans. Dutch, German, Greek, Hebrew, Italian, Japanese, Polish, Serbo-Croat, Spanish, Turkish

2nd. ed., foreword by John Gray (Princeton, 2013: Princeton University Press)

• adds an appendix containing letters (Bib.280) on the Mellon Lectures

See also the catalogue entry B.34 – which lists the six lectures in the series, and links to recordings of them