The manuscript is an antiphoner, a liturgical book intended for use in the liturgical choir. It is written in Latin, dates from the 15th-16th century, and is of Italian origin. The use is that of Rome.
Starting on f.1v, the manuscript mostly consists of noted Anthems and Psalms for the year, beginning in Advent (Roman Use)
Hymns start on f.204v. They include First Saturday in Advent at Vespers; Vigil of the Nativity at Vespers, Matins, and Lauds; Epiphany; First Saturday in Lent; Ascension; Pentecost at Vespers and Matins; Te Deum; Joseph fili David; O Lux Beata (inserted 17th century)
Written in a large Italian Gothic hand with one or two hymns added at the end in ordinary running script. There are three types of initials: Gothic capitals in black, ornamented with heads and faces and touched with thin green and yellow; plain blue and red capitals, with penwork in red and purple respectively; and three-line initials, blue, with elaborate
penwork in red, sometimes picked out with green.