The Newly-Discovered Irish and Breton Computistica in Città del Vaticano, BAV, MS Reg. Lat. 123
Jacopo Bisagni
The Vatican MS, BAV, Reg. lat. 123 (saec. xi, Ripoll), a computistical anthology, contains numerous excerpta of ultimate Irish provenance. Some these materials may have reached Ripoll through route transmission that brought them first to Brittany, and from there the scriptoria Fleury-sur-Loire itself.
Peritia