Piece ID is

PAss'emezo I.B. Besardi in tono precedente per b molle.

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

GB-Lbl K.4.h.1

Start: Folio: 98vSystem: 1 View Image
Finish: Folio: 99r View Image
Finish: Folio: 99v View Image

People associated with source:

Jean-Baptiste BesardComposer(Probable)