1. Harley MS 3199, ff 79r-88v Reference (shelfmark): Harley MS 3199, ff 79r-88v Title: Guido of Arezzo, Micrologus Scope & Content: Guido of Arezzo, Micrologus. The imperfect text is continued on ff. 91v-95v. Collection Area: Western Manuscripts Languages: Latin Date Range: 1st half of the 12th century Extent: 10 folios.