• Brittany
• Saint-Méen (?)

• Saint-Corneille de Compiègne (Oise)?
• Saint-Germain-des-Prés

• Computus
• Liturgy
• Calendar

• Calendar (probably added in the 11th century) (1r-7v)
• Computistical table with regulae mensium, epacts, claues terminorum, terminus septuagesimae, terminus quadragesimae, terminus paschalis, terminus rogationum, terminus pentecosten, and poem Nonne apr(ilis) norunt (quinos) (2r-v, 8r)
• Oration Suscipe sancta tri<ni>tas (2v)
• Prayers in various hands and Excusatio sacerdotis (8v-10v)
• Gregorian Sacramentary (10v-178v).

• Contains Breton neumes
• Numerous Breton saints in calendar
• Certainly written in Brittany

The calendar placed at the beginning of the MS contains the names of numerous Breton saints (cf. ILLB SM221, p. 112); however, these folios were probably added in the eleventh century. Nevertheless, prayers and masses to Samson, Machutus, Guoetgualus, Meuuinus and Judicaelus do occur in the main body of the MS, at fols 12v, 90v, 96v, 111r-v, 113v. This MS also contains two passages presenting Breton musical notation (fols 33v and 80v), and remarkable insular-like decorated initials can be seen, e.g., at fols 11r and 11v. Pace Duine (1922: 23–8), there seem to be no strong reasons to doubt the Breton origin of Lat. 11589, although the attribution to the abbey of Saint-Méen (in the diocesis of Saint-Malo) is perhaps less certain than is indicated in CMD III, 247 (cf. ILLB SM221, p. 111, 'L'identification reste discutée, le manuscrit est complexe').

BnF Archives et Manuscrits; CMD III, 247; Deuffic 2011: 67; DGVB 8; Duine 1922: 23–33; Huglo 1963: 60–1; ILLB SM221; L&S §969, 980; PMSB 311 (§85); Schrijver 2011: 9.

• https://gallica.bnf.fr/ark:/12148/btv1b84274376