 It contains a story of the life of Saint Patrick as told by Fintan mac Bóchra that contains the account of Trefuilngid Tre-eochair, a giant at the Hill of Tara who is first to hear about the crucifixion of Jesus Christ.Edward Lhuyd obtained the book from one of two sources; Ruaidhrí Ó Flaithbheartaigh about March 1700 at An Pháirc, An Spidéal; or from Dáithí Óg Ó Dubhda of Bunnyconnellan, County Sligo, in the same year.Ó Flaithbheartaigh and Ó Dubhda would have obtained them from Dubhaltach Mac Fhirbhisigh, whose family created and preserved the book.