I am an independent scholar and former research associate (2005–2008) and research affiliate (2004, 2008–2020) in the School of Historical Studies, Monash University. I completed my PhD in musicology at the University of Melbourne (2001) focusing on the music of Hildegard of Bingen (1298–1179). I have published on twelfth-century German plainchant and late-thirteenth-century music theory and am one of the collaborating editors and translators of Johannes de Grocheio’s Ars musice (c.a. 1270) and Guy of Saint-Denis’s Tractatus de tonis (c.a. 1301).


University of Melbourne, Doctor of Philosophy, Faculty of Music, 2001

Other Publications

Guy of Saint-Denis, Tractatus de Tonis, ed. & trans. Constant J. Mews, John N. Crossley,  Carol J. Williams and Catherine Jeffreys, Medieval Institute Publications 2017

Johannes de Grocheio, Ars musice, ed. & trans. Constant J. Mews, John N. Crossley, Catherine Jeffreys, Leigh McKinnon and Carol J. Williams, Medieval Institute Publications 2011

Catherine Jeffreys, “Some Early References to Aristotle’s Politics in Parisian Writings about Music” in Identity and Locality in Early European Music, 1028–1740, ed. Jason Stoessel, Routledge 2009

Catherine Jeffreys, “The Exchange of Ideas About Music in Paris 270–1304: Guy of Saint-Denis, Johannes de Grocheio, and Peter of Auvergne” in Communities of Learning: Networks and the Shaping of Intellectual Identity in Europe, 1100-1500, ed. Constant J. Mews & John N. Crossley, Brepols Publishers 2011

Constant J. Mews, Catherine Jeffreys, Leigh McKinnon, Carol Williams and John N. Crossley, “Guy of Saint-Denis and the Compilation of Texts about Music in London, British Library, Harl. MS. 281”, Electronic British Library Journal 2008, art 6, 1‒34

Catherine Jeffreys, “’Listen, Daughters of Light’: The Epithalamium and Musical Innovation in Twelfth-Century Germany” in Listen, Daughter: The “Speculum virginum” and the Formation of Religious Women in the Middle Ages, ed. Constant J. Mews,  The New Middle Ages Series. Palgrave 2001

Catherine Jeffreys, Sicut malum: Hildegards von Bingen Vertonung von Hohelied 2,3-6, Paulinus Verlag GmbH, 1998

Blog Posts


    The Liturgical Offices of King Saint Louis IX

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