Scope and Contents Manuscript leaf. Title supplied by cataloger. Recto of leaf includes the end of the "Gloriosus Dei amicus Vincen-" followed by the beginning of "Felici commercio pro terrenis," both of which are responsories sung during the liturgy of the Feast of St. Vincent of Saragossa; verso contains the end of "Felici commercio pro terrenis" and beginning of "Qui me confessus fuerit coram." On parchment. Layout: Five long lines, each accompanied by a musical staff; ruled in lead with double vertical...