The first step was to procure original ancient Irish manuscripts or to have copies made of them.
Unusually for a late medieval Irish manuscript, it is illustrated, including human portraits.
One of his major scriptural commentaries survives only in an old Irish manuscript.
There are many accounts within early Irish manuscripts of great tribal trees known as Bile being cut down by enemy tribes during times of war.
The exact number of Irish manuscripts still existing has never been accurately determined.
Catalogue of the Irish manuscripts in the Library of Trinity college.
It is found in the Book of the Dun Cow, an Irish manuscript dating to the early-12th century.
The Academy Library holds the largest collection of Old Irish manuscripts in the world.
It should not be confused with the similarly named Book of Lismore, an Irish manuscript from the early 15th century.
These placenames occur in Irish manuscripts and scholars say that the writers were referring to Ratoath.