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So the sons of Usnach were then slain, and the men of Ulster, when they beheld their death, sent forth their heavy shouts of sorrow and lamentation.

Stag, exult on glen and mountain— Salmon, leap from loch to fountain— Heron, in the free air warm ye— Usnach's sons no more will harm ye!

Woe is me! by fraud and wrong, Traitors false and tyrants strong, Fell Clan Usnach, bought and sold, For Barach's feast and Conor's gold!

It deals with the love of Deirdre for Naris and is founded on a Gaelic Version of the Tragical Tale of the Sons of Usnach.

It is a geis to the Ulster champion, Fergus mac Roy, that he must not refuse an invitation to a feast; on this turns the Tragedy of the Sons of Usnach.