Escorial O.II.10 Jean des Murs Medieval Music Theory

The ‘Partes prolationis’ of Jehan des Murs

I delivered a paper on a newly-transcribed fourteenth-century treatise on mensurable music (possibly written by Jehan des Murs) at the 42nd Medieval and Renaissance Music Conference held at the University of Birmingham, 3-6 July 2014. I hope to put the text of the treatise online when I have it fully transcribed: so far I have about 85% of its text deciphered. What follows below is the paper abstract, a works cited list, and a video of my presentation slides with an audio recording of my paper.


Within the mid-fourteenth century Parisian manuscript F-Pn lat. 7378A, three as yet unedited music treatises are found, copied in a tiny, highly abbreviated script in a section of the manuscript devoted mostly to the music treatises of Jehan des Murs. The incipits of the three treatises are as follows: ‘Omnes homines scire desiderant’; ‘Partes prolationis quot sunt’ and ‘Celebranda divina sunt officia in ecclesia’. Lawrence Gushee suggested that Jehan des Murs may be their author, since des Murs listed a book loan of a work authored by him with incipit ‘Omnes homines’ in the Escorial manuscript (O.II.10) that contains his autograph annotations. This paper considers the content of the second treatise, which appears to be closely related to Jehan des Murs’s own Compendium artis musicae. The Compendium begins: ‘Partes prolationis quot sunt? Quinque’ whereas the answer to the same opening question posed in the F-Pn lat. 7378A treatise is ‘Quattuor’. The text of this treatise is considered as a witness to early Ars nova theory as it relates to des Murs’s early works and to the transmission of these texts within the layer of F-Pn lat. 7378A that is devoted to works by des Murs (on both music and astronomy) and his contemporaries in these fields.

Works Cited

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