This thesis is a critical edition of the Old and Middle Irish versions of Aided Chonchobair ‘The violent death of Conchobar’. AC belongs to the aided category of tales of the Ulster Cycle. It has been transmitted in four recensions, A, B, C and D respectively, copies of which are preserved in a total of eight manuscripts. Despite largely diplomatic editions and translations of all four recensions of the tale having been published in The Death-Tales of the Ulster Heroes in 1906, Kuno Meyer was unaware of the existence of a copy preserved in NLS 72.1.5, and only became aware of RIA C i 2 and Laud Misc. 610 at a later date. TARA (Trinity’s Access to Research Archive) has a robust takedown policy. Please contact us if you have any concerns: rssadmin@tcd.ie