Unknown, Unknown, Unknown, Unknown (lost)

Contents:Parchment strip with Guillaume de Machaut “Le lay mortel.”

Bibliography:Droz, E. “Un Manuscrit de Guillaume de Machault.” Revue de Musicologie 8 (1927): 44.
Earp, Lawrence. Guillaume de Machaut: A Guide to Research. London: Routledge, 1996, 104.