Philippe de Vitry’s biggest motet, the 250-breve Petre/Lugentium, got even bigger when a tenor-contratenor voice pair for the motet came to light in a parchment fragment unglued from a binding. Here it is, courtesy of the Stadtbibliothek Aachen, where it lives:
I first ran into this source c. 2013 in a 2001 publication by Joachim Lüdtke. In an article just released online by Early Music (and which you can read for free by following this link—thanks OUP!) I evaluate its significance for our understanding of Vitry, especially of his motets Petre/Lugentium and Phi millies/O creator.
Petre/Lugentium was composed by Vitry in December 1342 in honor of Pierre Roger (1291–1352) in his first year as Pope Clement VI. It is an amazing motet with spectacular hockets, made only more spectacular now by the participation of two lower voices. To supplement the article I have made two new editions of it that incorporate the information that can be gleaned from this badly rubbed but ultimately legible fragment: