The hypothetical Irish commentary on Donatus’ Ars maior which according to Louis Holtz, underlies three extant Hiberno-Latin commentaries produced on the continent in the ninth century: those by Sedulius Scottus and Muiredach and the anonymous Ars Laureshamensis. The suggested scenario is that the work originated at home in Ireland and was brought to the continent by Irish peregrini.
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Commentary on Donatus, Ars maior, written c.840 by Muiredach (Muridac).