National Geographic also discusses the find.
Experts called to the site were amazed to find an ancient Psalter Book of Psalms lying in the mud. The archaeologists won't say exactly where the book was found until they are finished investigating the site.
About 20 pages long and written in Latin, the book has been dated to between A.D. 800 and 1000.
It is the first early medieval text to be discovered in Ireland in 200 years, the archaeologists say.
