
Folklore of the Aos Sí
Fionn and the Giant’s Causeway
Fionn agus Clochán na bhFomhórach
The strongest giant in Ireland is coming for Fionn. Fionn’s wife has a plan, a cradle and twenty-one iron griddles.
I The House on Knockmany
This is a fireside tale, and it has been told many ways. Here it is as William Carleton wrote it down in 1845, with the old voices still in it. 1
Fionn mac Cumhaill and his wife Oonagh lived on the very top of Knockmany, in Tyrone. It was a windy place with hardly a drop of water, and Fionn chose it for one reason: from the top he could see anyone coming. There was one man he was always watching for.
In those days Fionn and his giants were at work on the Causeway, a road of stone out across the sea to Scotland. But word came to him at the work that Cucullin was looking for him. Cucullin, who with one blow of his fist had flattened a thunderbolt into the shape of a pancake, and kept it in his pocket to show his enemies. Cucullin, who had beaten every giant in Ireland but one.
Fionn was the one. He went home to Knockmany in a hurry.

II Oonagh’s Charm
At home Fionn put his thumb in his mouth, the way he always did when he wanted to know what was coming. 2 He knew. Cucullin was on his way to Knockmany.
Oonagh did not waste any time being afraid. She drew out nine woollen threads, each a different colour, and plaited them into three plaits of three colours. One she tied round her right arm, one round her heart, and one round her right ankle. After that, the tellers say, nothing she set her hand to could fail.
Then she went round the neighbours and borrowed twenty-one iron griddles. She kneaded twenty-one cakes of bread and baked a griddle into the heart of each one. She put by a lump of soft white curds. And she dressed her husband up as a baby and tucked him into the cradle.
Lie there, she told him. Say nothing, and do what I tell you.

III The Visitor
Cucullin came up the hill like weather. Is this where Fionn mac Cumhaill lives? he asked.
It is, said Oonagh. But he’s away at the Causeway. A giant called Cucullin has been looking for him, and Fionn has gone out to find him. God help that man when he does.
Cucullin said nothing to that.
While you’re here, said Oonagh, would you do me a turn? The wind is blowing straight in the door, and Fionn always turns the house round when it does. So Cucullin pulled the middle finger of his right hand until it cracked three times, went out, and turned the house to face the other way. In the cradle Fionn felt the sweat break out on him.
And we’re short of water up here, said Oonagh. Cucullin cracked his finger again, and tore the rock of the hill open. The cleft is there still, and people call it Lumford’s Glen.
Then Oonagh sat him down to eat.

IV Bread and Stone
She set a cake in front of him. He bit into it and roared: he had broken his teeth on it. That’s the bread Fionn eats, said Oonagh, mild as milk. The child in the cradle eats it too. She gave him another, and he broke more teeth.
Then she gave the child in the cradle a cake of his own, one without any iron in it, and the child ate it down.
Cucullin looked at that child for a long time.
He picked up a white stone and squeezed it, to show what he could do. Not a drop came out of it. Let the child try, said Oonagh, and she slipped the soft white curds into Fionn’s hand. Fionn squeezed until the whey ran out between his fingers.
I’d like, said Cucullin slowly, to feel the teeth of a child who can eat bread like that.
So he put his finger into the child’s mouth: the middle finger of his right hand, where all his strength lay. And Fionn bit it off. 3
Every bit of Cucullin’s strength went out of him at once, like water from a broken jug. He fell, and he never rose again, and that was the end of the giant who had flattened the thunderbolt.

V The Other Endings
Walk the Causeway today and you may hear it told another way. In that telling the giant is a Scot called Benandonner, and Fionn loses his nerve when he sees the size of him striding over the stones. Oonagh puts Fionn in the cradle. Benandonner looks at the baby, imagines the father, and runs for home, tearing up the causeway behind him so that Fionn can never follow. All that is left are the stepping-stones at either end: here in Antrim, and across the water at Fingal’s Cave on Staffa.
That ending is younger than it looks. The name Benandonner turns up in print in 1832, in the Dublin Penny Journal, in the mouth of an Antrim farmer. In his version Fionn got leave from King Cormac to build a causeway to Scotland so that the bragging Scot could come over and be beaten, and Benandonner was beaten, and settled in Ireland, and married. In Patrick Kennedy’s collection of 1866 the Scottish giant, Far Rua, goes home across the causeway without breaking it. We have not found a nineteenth-century source for the torn-up road. 4
Fionn was not finished with the landscape, either. Chasing a red-haired Scottish giant one day, Kennedy says, he tore up rocks and clay and heaved them after him. The whole mass overshot and fell into the sea and became the Isle of Man, and the hollow it left filled with water and became Lough Neagh.

What the tale keeps
When strength fails, wit is its own kind of strength. An té nach bhfuil láidir, ní foláir dó a bheith glic: whoever isn’t strong had better be clever. The hero of this tale is not the man in the cradle.
And the stones are real. Some forty thousand basalt columns, most of them six-sided, cooled and cracked out of lava fifty to sixty million years ago. The people who lived beside them looked at a road running into the sea and asked the only sensible question: who built it? The Irish name keeps their answer. Clochán na bhFomhórach, the stepping-stones of the Fomorians.
Notes
- Carleton’s “A Legend of Knockmany” appeared in his Tales and Sketches Illustrating the Character of the Irish Peasantry (Dublin, 1845). Joseph Jacobs reprinted it in Celtic Fairy Tales (1892). ↩
- Carleton never explains the thumb. An older tale, the Boyhood Deeds of Fionn, does: cooking the salmon of Linn Féic for the poet Finnéces, the boy burned his thumb, put it in his mouth, and knew. ↩
- Some modern picture-books give Cucullin a finger of brass. Carleton does not; the strength is simply in the finger. ↩
- Dublin Penny Journal, vol. 1, no. 5, 28 July 1832; Patrick Kennedy, Legendary Fictions of the Irish Celts (1866). ↩
Where the tale comes from
Folk tale in print. A fireside tale set down by William Carleton in 1845, with later Causeway folklore.
- Carleton’s giant Cucullin borrows the name of Cú Chulainn, the Ulster hero, but he is a different creature. Carleton leaves his country open: “some say he was Irish, and some say he was Scotch.”
- The official Irish name of the Giant’s Causeway today is Clochán an Aifir. The older literary name is Clochán na bhFomhórach, and another old name is Tóchar na dTréanfhear, “causeway of the strong men”.
- Knockmany is Cnoc mBáine, “Báine’s hill”, recorded as early as 772. There is a real passage tomb on its summit, known as Annia’s Cove.
- The Giant’s Causeway and Causeway Coast were inscribed as a UNESCO World Heritage Site in 1986.
Sources
- "A Legend of Knockmany", in Tales and Sketches Illustrating the Character of the Irish Peasantry · William Carleton (Dublin, 1845)
- Celtic Fairy Tales · Joseph Jacobs (1892)
- "The Giant's Causeway", Dublin Penny Journal 1:5 (28 July 1832) · Dublin Penny Journal
- Legendary Fictions of the Irish Celts · Patrick Kennedy (1866)
- Giant's Causeway and Causeway Coast · UNESCO World Heritage Centre
- History of the Giant's Causeway · National Trust
- Northern Ireland Place-Name Project · Queen's University Belfast