Computus; Calculus.

Origin Ireland
Script Irish Minuscule
Contents Computus; Calculus.
Foliation Four folios survive, in part mulitated: I in Milan, folded in two and bound in at the end of a commentary on Donatus saec. IX; I in Nancy, bound in at the end of a grammatical manuscript saec. IX; and 2 in the Vatican, front fly-leaves paginated 3-6 in a manuscript containing Epistulae Pauli with a Comes in uncial and cursive minuscule saec. VII; ca. 320 X 245 mm. in 30 or 32 long lines, in the calculus up to 45 lines.
Comments Written presumably in Ireland, to judge by the script and the use of vellum, rather than at Bobbio where the fragments were used for binding purposes.

Initials: the group IN decorated with simple Insular motifs occurs on p. 4 of the Vatican manuscript; other small initials showing the bird's head and a human face are seen on the leaf in Nancy; the rest are in simple bold black. Script is Irish minuscule by at least two hands. Old Irish glosses are found on the Vatican and Nancy leaves. The fragmentary bifolium Vatic. Lat. 13501, no. XXIV of unknown provenance, which also contains computistical matter written by four ninth-century Irish hands, may have once formed part of the same manuscript.
City Milan
Library Biblioteca Ambrosiana
Saec VIII-IX vel IXI.
Shelfmark L. 22 sup. (foll. 146, 147) + Nancy, Bibliothèque Municipale 317 (fly-leaf) + Vatican City, Vatic. Lat. 5755 (pp. 3-6).
CLA 12.1734