" Cucúlin agreed to this.
Next morning they would not stop nor be satisfied till they went their way. They found the castle of Thin-in-Iron, and Cucúlin challenged him to combat. They fought; and he was cutting the flesh from Cucúlin, but Cucúlin's sword cut no flesh from him. They fought till Cucúlin said: "It is time now to stop till to-morrow."
Cucúlin was scarcely able to reach the tent. They had to support him and put him to bed. Now, who should come to Cucúlin that night but Gil an Og, and she said: "You have gone further than any man before you, and I'll cure you now, and you need go no further for the rod of enchantment and the ring of youth."
"Well," said Cucúlin, "I'll never give over till I knock another day's trial out of Thin-in-Iron."
When it was time for rest, Gil an Og went away, and Cucúlin fell asleep for himself. On the following morning all his comrades were up and facing his tent. They thought to see him dead, but he was in as good health as ever.
They prepared breakfast, and after breakfast Cucúlin went before the door of the castle to challenge his enemy.
Thin-in-Iron thrust his head out and said: "That man I fought yesterday has come again to-day. It would have been a good deed if I had cut the head off him last night. Then he wouldn't be here to trouble me this morning. I won't come home this day till I bring his head with me. Then I'll have peace."
They met in combat and fought till the night was coming. Then Thin-in-Iron cried out for a cessation, and if he did, Cucúlin was glad to give it; for his sword had no effect upon Thin-in-Iron except to tire and nearly kill him (he was enchanted and no arms could cut him). When Thin-in-Iron went to his castle, he threw up three sups of blood, and said to his housekeeper: "Though his sword could not penetrate me, he has nearly broken my heart."
Cucúlin had to be carried to his tent. His comrades laid him on his bed and said: "Whoever came and healed him yesterday, may be the same will be here to-night.