• B.A., and M.A. in English, D.Litt. in History, Wadham College, Oxford, 1964, 1966, 1987
  • Ph.D. University of Michigan, 1970


  • Marsilio Ficino: The Philebus Commentary (1975)
  • Marsilio Ficino and the Phaedran Charioteer (1981)
  • The Platonism of Marsilio Ficino (1984)
  • Icastes: Marsilio Ficino’s Interpretation of Plato’s ‘Sophist’ (1989)
  • Nuptial Arithmetic: Marsilio Ficino’s Commentary on the Fatal Number in Book VIII of Plato’s ‘Republic’ (1994)
  • Plato’s Third Eye: Studies in Marsilio Ficino’s Metaphysics and its Sources (1995)
  • Synoptic Art: Marsilio Ficino on the History of Platonic Interpretation (1998)
  • Marsilio Ficino: Platonic Theology, Ed. and tr. with James Hankins, six vols. (2001-2006)
  • Marsilio Ficino: Commentaries on Plato: Volume I: Phaedrus and Ion (2008)
  • Marsilio Ficino: On Dionysius the Areopagite: Vol. 1:  On Mystical Theology & The Divine Names, Part I;  Vol. 2: On The Divine Names, Part II (2015).
Also coauthor of Sources and Analogues of Old English Poetry: the Major Latin Texts (1976), and coeditor of Shakespeare’s Plays in Quarto (1982), Sir Philip Sidney’s Achievements (1989), and Marsilio Ficino: His Theology, His Philosophy, His Legacy (2002).