Annala Rioghachta Eireann: Annals of the Kingdom of Ireland by the Four Masters

The Annals are printed in the original Irish with English translation on the facing pages by O'Donovan. In Irish, with O'Donovan's English translation on facing pages, and copious footnotes.

O'Donovan published the second half of the Annals in three volumes in 1848, which covered the years 1172 to 1616 AD. After the unexpected success of this publication, O'Donovan went back to the manuscript of the Annals and edited the first half, covering the years AM 2242 to AD 1171, publishing this part in three volumes in 1851. New title and final pages were supplied to buyers of the 1848 set, and binders were instructed to rebind the work into a single set of six volumes bound separately, plus an index volume of persons and places. The result is a set of seven volumes with title pages dated 1851.