The Round Towers of Ireland. Or, The History of the Tuath-de-Danaans. New Edition.With Introduction, Synopsis, Index, etc. Limited Edition of 750 Numbered Copies. London: Parbury and Allen, 1898. Pp, xxxix, 515, uncut. with frontispiece portrait, 11 wood-engraved plates, 20 wood- engraved text illustrations, list of Towers and Crosses. Publisher’s green cloth, title lettered in gilt to spine. A very good copy.

A facsimile of second edition published in 1834. A work now largely discredited, O’Brien argued that Round Towers were of pre-Christian in origin and built by Tuath-de-Danaan, a race in Irish mythology, thought to represent the main deities of pre-Christian Gaelic Ireland.