La Trobe University - Library: Medieval Music Database - Annual cycle of feasts of liturgical chant, liturgical polyphony and secular music of the late middle ages.

Medieval Music Database - Browse By Manuscript

Manuscripts containing works by Grimace

Bern, Bürgerbibliothek A 421
Chantilly, Bibliothèque du Musée Condé 564
Munich, Bayerische Staatsbibliothek 29775 - not catalogued here.
Paris, Bibliothèque Nationale, fonds italien 568
Paris, Bibliothèque Nationale, fonds nouv. acq. français 6771 (Reina Codex)
Philadelphia, University of Pennsylvania Library, French MS 15
Strasbourg, Bibliothèque Municipale (olim Bibliothèque de la Ville) 222 C. 22