A quire of ten leaves bound up in a volume of miscellaneous contents preserved in the Bodleian Library, and called St. Dunstan's Classbook (Auct. F. 4. 32 ) represents the earliest surviving manuscript of Book I of Ovid's Ars amatoria (Art of Love). According to a Bodleian Library exhibition catalogue, the last leaf of the manuscript may be in St. Dunstan's hand:
"The original manuscript was probably written in Wales. There are some glosses in Old Welsh, and the 'syntax marks' . . . inserts as a help to construing are also a Welsh feature. This manuscript and the 9th-cent. French copy, Paris lat. 7311, are the oldest manuscripts of the work, and they are closely related" (Hunt, R.W., The Survival of Ancient Literature  no. 117).
Digital facsimile from Digital Bodleian at this link.