Piece ID is

PAss'emezo eiusdem toni per b durum à Io.Bap. Besardo.

in THESAURUS HARMONICUS DIVINI LAURENCINI ROMANI, NEC NON [...] Ad decennium.

GB-Lbl K.4.h.1

Start: Folio: 103rSystem: 1 View Image
Continuation: Folio: 104r View Image
Finish: Folio: 103v View Image
Finish: Folio: 104v View Image

People associated with source:

Jean-Baptiste BesardComposer(Probable)