P-EVp (Évora) Biblioteca Pública Pasta 3, doc. 026
This fragment contains offices for Pentecost and some days in its octave. All feasts are characterized by a certain lack of fixity and interchangeability of chants throughout the entire week.
This fragment's choice of chants and their succession thus tell of the expectable strong ties with Aquitanian and Iberian traditions, as well as presenting some rather rare items that are apparently only circumscribed to Aquitanian-Iberian sources. One example is the short responsory verse 007530zb.
Further analysis could help clarifying the origins of this fragment as well as feasts in the octave of Pentecost in Portugal, especially when set against manuscripts more complete and of safer origins such as P-BRs Ms. 32 and the Évora 1528 printed breviary (P-Ln RES. 253 P).