It was at that time, now, there was great war between Lir of Sidhe Fionnachaidh and Ilbrec of Ess Ruadh. There used a bird with an iron beak and a tail of fire to come every evening to a golden window of Ilbrec's house, and there he would shake himself till he would not leave sword on pillow, or shield on peg, or spear in rack, but they would come down on the heads of the people of the house; and whatever they would throw at the bird, it is on the heads of some of themselves it would fall. And the night Caoilte came in, the hall was made ready for a feast, and the bird came in again, and did the same destruction as before, and nothing they threw at him would touch him at all. "Is it long the bird has been doing this?" said Caoilte. "Through the length of a year now," said Derg, "since we went to war with Sidhe Fionnachaidh."
Then Caoilte put his hand within the rim of his shield, and he took out of it a copper rod he had, and he made a cast of it at the bird, that brought it down on the floor of the hall. "Did any one ever make a better cast than that?" said Ilbrec. "By my word," said Caoilte, "there is no one of us in the Fianna has any right to boast against another." Then Ilbrec took down a sharp spear, having thirty rivets of gold in it, from its place, and he said: "That is the Spear of Fiacha, son of Congha, and it is with that Finn made an end of Aillen, son of Midhna, that used to burn Teamhair. And keep it beside you now, Caoilte," he said, "till we see will Lir come to avenge his bird on us."
Then they took up their horns and their cups, and they were at drinking and pleasure, and Ilbrec said: "Well, Caoilte," he said, "if Lir comes to avenge his bird on us, who will you put in command of the battle?" "I will give the command to Derg there beyond," said he. "Will you take it in hand, Derg?" said the people of the hill. "I will take it," said Derg, "with its loss and its gain."
So that is how they spent the night, and it was not long in the morning till they heard blowing of horns, and rattling of chariots, and clashing of shields, and the uproar of a great army that came all about the hill. They sent some of their people out then to see were there many in it, and they saw three brave armies of the one size. "It would be a great vexation to me," said Aedh Nimbrec, the Speckled, then, "we to get our death and Lir's people to take the hill." "Did you never hear, Aedh," said Caoilte, "that the wild boar escapes sometimes from both hounds and from wolves, and the stag in the same way goes away from the hounds with a sudden start; and what man is it you are most in dread of in the battle?" he said. "The man that is the best fighter of all the Men of Dea," said they all, "and that is Lir of Sidhe Fionnachaidh." "The thing I have done in every battle I will not give up to-day," said Caoilte, "to meet the best man that is in it hand to hand." "The two that are next to him in fighting," they said then, "are Donn and Dubh." "I will put down those two," said Derg.
Then the host of the Sidhe went out to the battle, and the armies attacked one another with wide green spears and with little casting spears, and with great stones; and the fight went on from the rising of the day till midday. And then Caoilte and Lir met with one another, and they made a very fierce fight, and at the last Lir of Sidhe Fionnachaidh fell by the hand of Caoilte.
Then the two good champions Dubh and Donn, sons of Eirrge, determined to go on with the battle, and it is how they fought, Dubh in the front of the whole army, and Donn behind all, guarding the rear. But Derg saw that, and he put his finger into the thong of his spear and made a cast at the one that was nearest him, and it broke his back and went on into the body of the other, so that the one cast made an end of the two. And that ended the battle, and all that was left of the great army of Lir went wearing away to the north. And there was great rejoicing in the hill at Ess Ruadh, and Ilbrec took the spoils of the beaten army for his people, and to Caoilte he gave the enchanted spear of Fiacha, together with nine rich cloaks and nine long swords with hilts and guards of gold, and nine hounds for hunting. And they said farewell to one another, and Caoilte left his blessing to the people of the hill, and he brought their thanks with him. And as hard as the battle had been, it was harder again for Derg to part from his comrade, and the day he was parted from Finn and from all the Fianna was no sadder to him than this day.
It was a long time after that Caoilte went again to the hill of Ilbrec at Ess Ruadh, and this is the way it happened.
It was in a battle at Beinn Edair in the east that Mane, son of the King of Lochlann, made a cast at him in the middle of the battle with a deadly spear. And he heard the whistling of the spear, and it rushing to him; and he lifted his shield to protect his head and his body, but that did not save him, for it struck into his thigh, and left its poison in it, so that he had to go in search of healing. And it is where he went, to the hill of the Sidhe at Ess Ruadh, to ask help of Bebind, daughter of Elcmar of Brugh na Boinne, that had the drink of healing of the Tuatha de Danaan, and all that was left of the ale of Goibniu that she used to be giving out to them.
And Caoilte called to Cascorach the Musician, son of Caincenn, and bade him bring his harp and come along with him. And they stopped for a night in the hill of the Sidhe of Druim Nemed in Luigne of Connacht, and from that they went forward by Ess Dara, the Fall of the Oaks, and Druim Dearg na Feinne, the Red Ridge of the Fianna, and Ath Daim Glas, the Ford of the Grey Stag, and to Beinn Gulbain, and northward into the plain of Ceitne, where the Men of Dea used to pay their tribute to the Fomor; and up to the Footstep of Ess Ruadh, and the High Place of the Boys, where the boys of the Tuatha de Danaan used to be playing their hurling. And Aedh of Ess Ruadh and Ilbrec of Ess Ruadh were at the door of the hill, and they gave Caoilte a true welcome. "I am glad of that welcome," said Caoilte. And then Bebind, daughter of Elcmar of Brugh na Boinne, came out, and three times fifty comely women about her, and she sat down on the green grass and gave three loving kisses to the three, to Caoilte and to Cascorach and to Fermaise, that had come with them out of the hill of the Sidhe in Luigne of Connacht. And all the people of the hill welcomed them, and they said: "It is little your friendship would be worth if you would not come to help us and we in need of help." "It was not for bravery I was bade come," said Cascorach; "but when the right time comes I will make music for you if you have a mind to hear it." "It is not for deeds of bravery we are come," said Fermaise, "but we will give you our help if you are in need of it." Then Caoilte told them the cause of his journey. "We will heal you well," said they. And then they all went into the hill and stayed there three days and three nights at drinking and pleasure.
And indeed it was good help Caoilte and Cascorach gave them after that. For there was a woman-warrior used to come every year with the ships of the men of Lochlann to make an attack on the Tuatha de Danaan. And she had been reared by a woman that knew all enchantments, and there was no precious thing in all the hills of the Sidhe but she had knowledge of it, and would bring it away. And just at this time there came a messenger to the door of the hill with news that the harbour was full of ships, and that a great army had landed, and the woman-warrior along with it.