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 bounding lines. Script: Written in a rounded gothic script. Decoration: Large initial Q in blue, silver, pink, burgundy, and white; musical staff and some text in red; some pen-flourished capitals. Music: Contains staff notation (5 line). Origin: Probably written in Spain during the 16th century; level of abbreviation suggests the first half of the 16th century. Content and character of hand (especially the stylized capital F on the recto lead) suggest Spanish workmanship.