Dignities, Feudal and Parliamentary: And the Constitutional Legislature of the United Kingdom, Volume 1

The Gael and Cymbri: Or, An Inquiry Into the Origin and History of the Irish Scoti, Britons, and Gauls, and of the Caledonians, Picts, Welsh, Cornish, and Bretons

The Origin and History of the Constitution of England: And of the Early Parliaments of Ireland

Leabhar Dhimma (Antient copy of the gospels) Venerable Bede. Antient Irish church. Memoir of the O'Carrols. The Caah (Psalter of St. Columbkill) Memoir of the O'Donells. The Meeshac. The Geraldine knights. Antient letters and documents

Papers Read Before the Royal Irish Academy

Historical and Genealogical Memoir of the Family of Fleming of Slane, in the County Palatine of Meath, etc

Irish antiquarian researches: Part 1

Etruria-celtica: Etruscan Literature and Antiquities Investigated: Or, The Language of that Ancient and Illustrious People Compared and Identified with the Iberno-Celtic, and Both Shown to be Phœnician, Volume 2