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Born 1928 in Germany. Emigrated to Brazil in 1949. Undergraduate study in Curitiba, Paraná. Graduate study at Ohio University in Athens, Ohio, with MA in English (1956). Then at The Ohio State University, Columbus, Ohio, with PhD (1960). Taught in the Department of English and in Comparative Literature at the University of North Carolina at Chapel Hill, 1960-1975. Then at the University of Pennsylvania, 1975-1996. After retirement taught a course on Medieval Latin  Paleography twice, at UNC (1998 and 2001),

Main scholarly interests have been medieval literature and especially preaching and sermons.


1953, BA Letras Anglo-Germanicas, University of Parana, Brazil

1956, MA English, Ohio University, Athens, OH

1960, PhD English, The Ohio State University


  • The Sin of Sloth: Acedia in Medieval Thought and Literature (Chapel Hill: The University of North Carolina Press, 1967)
  • Macaronic Sermons: Bilingualism and Preaching in Late Medieval England (Ann Arbor, MI: University of Michigan Press, 1994)
  • Latin Sermon Collections from Later Medieval England: Orthodox Preaching in the Age of Wyclif  (Cambridge: Cambridge University Press, 2005)
  • Preaching in the Age of Chaucer: Selected Sermons in Translation.  Trans. Siegfried Wenzel (Washington, D.C.: The Catholic University of America Press, 2008)
  • Medieval Artes Praedicandi: A Synthesis of Scholastic Sermon Structure. Medieval Academy Books, No. 114 (Toronto: Published for The Medieval Academy of America by University of Toronto Press, 2015)
  • “The Pilgrimage of Life as a Late Medieval Genre,” Mediaeval Studies, 35 (1973), 370-388
  • Of Sins and Sermons. Synthema 10. Leuven – Paris – Bristol, CT: Peeters, 2015. Pp. xiv + 430.
  • The Sermons of William Peraldus: An Appraisal. Sermo 13. Turnhout, Belgium: Brepols, 2017. Pp. xii + 217.
  • Beyond the Sermo modernus. Sermon Form in Early Fifteenth-Century England. Studies and Texts 222. Toronto: Pontifical Institute of Mediaeval Studies, 2021. Pp. xii+282.

A full list can be found on my web page.


  • Guggenheim Fellowship, 1968-1969.
  • Guggenheim Fellowship, 1982-1983.
  • Fellowships from ACLS (1964) and NEH (1975 and 1984).
  • Fellow of the Medieval Academy of America, 1978-.

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