Contains two pieces of polyphonic music. One agrees with Hu (Códice de Las Huelgas). One piece contains the name of the author (now illegible) brfore the formula 'me fecit.' The bifolio is attached to the binding at the end of MS 1, placed 'upside down' in relation to the rest of the MS. It was named 'MS 1 bis' by Gómes Muntané.
Concordances & Cognates:
BAR - Barcelona, Archivo de los frailes capuchinos, Ms 7.6.10
HUE - Burgos, Monasterio de Las Huelgas, Ms. s/n
RIP - Barcelona, Archivo de la Corona de Aragón, Ripoll 139
ORF - Barcelona, Orfeó Català, Ms 1
PAR - París, Bibliothèque Nationale, lat. 11411