With that he and his men rose up and went out of Teamhair, and they stopped to rest beside a river, and there they heard the sound of a very sorrowful tune, that was like keening, played on a harp. And there was great anger on Osgar when he heard that, and he rose up and took his arms and roused his people, and they went on again to where Finn was. And there came after them a messenger from the High King, and the message he brought was this, that he never would pay tribute to the Fianna or bear with them at all from that time.
And when Finn heard that, he sent a challenge of battle, and he gathered together all the Fianna that were left to him. But as to the sons of Morna, it was to the High King of Ireland they gathered.
And it was at the hill of Gabhra the two armies met, and there were twenty men with the King of Ireland for every man that was with Finn.
And it is a very hard battle was fought that day, and there were great deeds done on both sides; and there never was a greater battle fought in Ireland than that one.
And as to Osgar, it would be hard to tell all he killed on that day; five score of the Sons of the Gael, and five score fighting men from the Country of Snow, and seven score of the Men of Green Swords that never went a step backward, and four hundred from the Country of the Lion, and five score of the sons of kings; and the shame was for the King of Ireland.
But as to Osgar himself, that began the day so swift and so strong, at the last he was like leaves on a strong wind, or like an aspen-tree that is falling. But when he saw the High King near him, he made for him like a wave breaking on the strand; and the king saw him coming, and shook his greedy spear, and made a cast of it, and it went through his body and brought him down on his right knee, and that was the first grief of the Fianna. But Osgar himself was no way daunted, but he made a cast of his spear of the nine spells that went into the High King at the meeting of the hair and the beard, and gave him his death. And when the men nearest to the High King saw that, they put the king’s helmet up on a pillar, the way his people would think he was living yet. But Osgar saw it, and he lifted a thin bit of a slab-stone that was on the ground beside him, and he made a cast of it that broke the helmet where it was; and then he himself fell like a king.
And there fell in that battle the seven sons of Caoilte, and the son of the King of Lochlann that had come to give them his help, and it would be hard to count the number of the Fianna that fell in that battle.