Piece ID is

GAlliarda eiusdem toni ab eodem.

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

GB-Lbl K.4.h.1

Start: Folio: 118vSystem: 7 View Image
Finish: Folio: 119r View Image

People associated with source:

Jean-Baptiste BesardComposer(Probable)