Well-preserved breviarium which probably was one of the first Gregorian chant manuscripts copied outside Catalonia after the suppression of the Hispanic rite in the Iberian Peninsula (Walker, 1998, p. 133). It probably comes from Silos (Vivancos, 2007, pp. 280 – 281). It has parchment folios and a 20th century binding. The cartulation was added in two different periods: one segment from the 18th century, written at the right top of the pages, with some repetitions and omissions, and another one from the 19th century. The text was probably copied by a single hand, with Visigothic script in a single column.
The music notation is similar but not equal to Hispanic vertical notation, and resembles "Catalan notation" displaying Aquitanian influences. The space for the music of several chants remains blank.
It contains chants for temporale and sanctorale days from the 2nd Sunday of Advent to the 4th Wednesday of Lent.