11. Harley MS 3199, ff 89r-91r Reference (shelfmark): Harley MS 3199, ff 89r-91r Title: Office of the Nativity of the Virgin Mary Scope & Content: An office of the Nativity of the Virgin Mary Collection Area: Western Manuscripts Languages: Latin Date Range: 1st half of the 12th century Extent: 3 folios.
12. Harley MS 3199, ff 58v-65r Reference (shelfmark): Harley MS 3199, ff 58v-65r Title: Guido of Arezzo, Epistola de cantu ignoto (Epistola ad Michaelem) Scope & Content: Guido of Arezzo, Epistola de cantu ignoto, also known as the Epistola ad Michaelem Collection Area: Western Manuscripts Languages: Latin Date Range: 1st half ofthe 12th century Extent: 8 folios.
