“Recreation and Entertainment in Early Welsh Towns” in Urban Culture in Early Wales
ed. Helen Fulton (Cardiff: University of Wales Press, at press).
“Staging the Unstageable: Performing the Crucifixion in Medieval Britain” in Aspects of Medieval Civic Drama: Essays in Honour of David Mills (2010).
“English Economies and Welsh Realities: Drama in Early Wales” in Authority and Subjugation in Writing of Medieval Wales eds. Ruth Kennedy and Simon Meecham-Jones. (Palgrave Macmillan, 2008), pp. 213-29.
“Petitionary Poetry in Old English and Early Welsh: Deor, Widsiğ, Dadolwch Urien” Poetry, Place and Gender: Studies in Medieval Culture in Honor of Helen Damico Kalamazoo, MI: Medieval Institute Publication, 2009.
“The Modular Structure of Wisdom” in ‘Bring furth the pagants’: Essays in Early English Theatre presented to Alexandra F. Johnston (University of Toronto Press, 2006).
Records of Early Drama: Wales (University of Toronto Press, 2006), clxxiii + 528 pp.
Reviews: Chris Grooms in Arthuriana 16/1 (2006), 75-7
John McGavin in Comparative Drama 40/3 (2006), 365-72
Arthur F. Kinney in Kritikon litterarum 33/3-4 (2006), 142-3.
Garrett Epp in University of Toronto Quarterly 76/1 (2007), 381-2.
Peter Davison in The Library 7/7/4 (December, 2007), 342-4.
Megan Lloyd in The Journal of British Studies, 46/1 (2007), 962-4.
Gloria Betcher in Sixteenth Century Journal 38/3 (2007), 921-2,
William P. Williams in Notes & Queries 55 (2008), 527-8
Sally Harper in Cambrian Medieval Celtic Studies 55 (2008), 63-5.
“Civic Musicians in Wales and the Marches, 1430-1642” Music and Medieval Manuscripts: Palaeography and Performance: Essays in Honour of Andrew Hughes ed. J. Haines and R. Rosenfeld (Ashgate, 2004), pp 279-299.
“Early Welsh Drama” in The
“Plays and Performing in South Wales” Early Theatre 6/2 (December 2003), 57-72.
"Family Entertainments among the Salusburys of Lleweni, Denbighshire and their Circle, 1595-1641" Welsh Music History/Hanes Cerddoriaeth Cymru v (2003 - forthcoming).
"The Improvising Vice in Renaissance England" in Improvisation in the Arts T. J. McGee, ed. (Western Michigan University Press, 2002), pp. 1-13.
"Vernacular Drama" in A Performer's Guide to Medieval Music ed. Ross Duffin (Indiana University Press, 2000), pp 253-64.
"Statud Gruffudd ap Cynan" Welsh Music History/Hanes Cerddoriaeth Cymry iii (1999), pp 282-98.
"The Gospel of Nichodemus in the Literature of Medieval Wales" in The Medieval Gospel of Nichodemus: Texts, Intertexts, and Contexts in Western Europe Z. Izydorczyk, ed. Medieval and Renaissance Texts and Studies 158 (University of Arizona Press, 1997) pp. 403-418.
"Parish Drama and the Journal of Prior William More" in English Parish Drama Ludus I A. F. Johnston and Wim Hüsken, eds. (Amsterdam 1996), pp. 119-35.
"Time and Place in the Battle Poetry of Early Britain" in The Northwest in the Middle Ages T. Scott and P. Starkey, eds. Liverpool 1995), pp. 85-107.
Singing Early Music: An Introductory Guide to the Pronunciation of European Languages in the Late Middle Ages and Renaissance (with T. McGee and A. G. Rigg). Indiana University Press 1996. My contribution involved editing the contributed chapters, devising the phonological system and acting as phonological consultant to contributors, contributing the chapters on the pronunciation of English and Scots (pp. 1-4, 13-45, 289-95, 297-99), and recording the sixty-six examples on the accompanying CD.
"The Beasts of Battle in Early Welsh Poetry" in The Centre and its Compass: Perspectives on Medieval Literature, Essays in Honour of Prof. John Leyerle Studies in Medieval Literature 33, ed. R. A. Taylor, Western Michigan University Press (1993), pp. 247-263.
Ed. with Sheila Campbell and B. S. Hall Health, Disease and Healing in Medieval Culture (St. Martin's Press, 1992). 204pp.
Records of Early English Drama: Herefordshire and Worcestershire. (University of Toronto Press, 1990). 734pp.
"Music", in A Companion to Medieval Theatre ed. R. W. Vince (Greenwood Press, 1989), pp 257-64.
For the Dictionary of the Middle Ages, ed. J. Strayer (New York: Scribners, 1982-1991), articles on the following subjects:
"Doctrine and Drama in 'Guy of Warwick'" Medievalia et Humanistica New Series, 6 (1975), pp. 103-119.
"The Harvard Manuscript of 'The Tournament of Tottenham'" Neuphilologische Mitteilungen 4 lxxiv (1973), pp. 676-685.
"Exempla and 'The Awntyrs of Arthure'" Mediaeval Studies xxxiv (1972), pp. 307-325.