One of four codicologically unrelated leaves from an antiphonary, a choral book containing the music used in the Divine Office.
1 column of 6 staves in Latin. Bounding lines blind or light plummet, doubled and full-length to upper and lower edges, writing lines blind or light plummet, with upper and lower bounding lines for each line of text. Heightened square notation on a four-line red staff, C-clef indicated.
Written in a Italian rotunda script in black ink, red rubrics. Two-staff-high historiated initial on the verso with Agatha imprisoned in a light salmon and green tower on gold background, in foliate [D] (for "Dum ingrederetur…") in gold and colors with acanthus into margins.