Title supplied by cataloger.
Collation: Parchment, 123; 1⁶ 2-14⁸ 15¹³ (+1); leaves 2-7 of the last gathering signed a2-a7; catchwords on last verso of gatherings 2-14, lower center; modern foliation in pencil, lower right recto.
Layout: Musical notation written on four 4-line staves in red ink with accompanying text; text (f. 111r-121v) written in 18 long lines; text ruled in drypoint with vertical bounding lines in faint ink or lead.
Script: Written in the Italian bookhand of Frater Johannes de plebe (f. 121v).
Decoration: Illustration in brown ink with details in red and blue ink of Guidonian hand with filigree cuff (f. 122r); ladder diagram of the gamut on a red 12-line staff and John 1.1-12 written in red ink and surrounded by a round penwork frame in blue ink (f. 122v); rubrics in red, initial letters touched in yellow with simple penwork tracery, 1- or 2-line initials alternating in red and blue throughout.
Binding: Early binding of brown leather over thin wooden boards, tooled with floral panels, leaves and symbols surrounding a Madonna and Child above a winged face, more easily seen on lower cover; remnants of a clasp; head and tail of spine now exposed (Sotheby's).
Origin: Written in Italy in the second half of the 15th century (Sotheby's).