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Kilkenny cats

Kilkenny cats is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Kilkenny cats rather than just read about it. In short: The Kilkenny cats are a fabled pair of cats from County Kilkenny (or Kilkenny city in particular) in Ireland, who fought each other so ferociously that only their tails remained at the end of the battle. Often the absurd implication is that they have eaten each other.

Kilkenny cats — main illustration
Kilkenny cats — illustration

Key takeaways

  • Kilkenny cats belongs to science; place it in that map before memorising details.
  • Learn the definition first, then one example that makes the definition concrete.
  • Connect Kilkenny cats to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of Kilkenny cats from memory before moving on to harder problems.

Reference excerpt

The Kilkenny cats are a fabled pair of cats from County Kilkenny (or Kilkenny city in particular) in Ireland, who fought each other so ferociously that only their tails remained at the end of the battle. Often the absurd implication is that they have eaten each other. In the nineteenth century the Kilkenny cats were a common simile for any conflict likely to ruin both combatants. Kilkenny cat is also used more generally for a fierce fighter or quarrelsome person. These senses are now rather dated. In the later twentieth century the motif was reclaimed by Kilkenny people as a positive symbol of tenacity and fighting spirit, and "the Cats" is the county nickname for the Kilkenny hurling team. The original story is attested from 1807 as a simple joke or Irish bull; some early versions are set elsewhere than Kilkenny. Nevertheless, theories have been offered seeking a historical basis for the story's setting.

Versions of the story The earliest attested version of the story is from June 1807, in Anthologia, a collection of jokes and humorous pieces copied by "W.T." of Inner Temple from unnamed previous publications. Steven Connor characterises the story as an Irish bull. Under the heading "Kilkenny Cats" it runs:

In a company, consisting of naval officers, the discourse happened to turn on the ferocity of small animals; when an Irish gentleman present stated his opinion to be, that a Kilkenny cat, of all animals, was the most ferocious; and added, "I can prove my assertion, by a fact within my own knowledge:— I once," said he, "saw two of these animals fighting in a timber yard, and willing to see the result of a long battle, I drove them into a deep sawpit, and placing some boards over the mouth, left them to their amusement. Next morning I went to see the conclusion of the fight, and what d'ye think I saw?"– "One of the cats dead, probably," —replied one of the company.— "No by Ja—s! there was nothing left in the pit, but the two tails and a bit of flue!" The tale was repeated verbatim the next month in The European Magazine's review of Anthologia, as well as The Sporting Magazine, also in London, and Walker's Hibernian Magazine in Dublin. It reappeared in 1812 in Thomas Tegg's The Spirit of Irish Wit, and in the 1813 supplement to William Barker Daniel's Rural Sports. The following appears in Thomas Gilliland's The Trap, an 1808 satire on the theme of love:

When I was last at Kilkenny, said Teague, I saw two big ram-cats fight a duel for love, your honour; and they fought, and fought, till they ate each other up. Devil burn me, if I lie, your honour! I went after them into the gutter! "Tommy!" says I, "my dear Phely!" says I, but no Tommy or Phely was there: I found only the tips of their tails. An 1811 joke book from Boston in the United States included:

On a gentleman's reading an account of a tiger fight in the East Indies, an Irishman present exclaimed: 'a tiger be hang'd! Why, sir, I once myself saw two Kilkenny cats fight till they devoured each other up, excepting the very tips of their two tails.' Another version is alluded to in an 1816 critique of a pamphlet by Andrew O'Callaghan, master of Kilkenny College:

There is a story told in Kilkenny, that several cats had been locked up in a room, for a fortnight together, without food, and, upon opening the door, there was nothing found but the tail of one of them. Surely Mr. O'C. must have been dreaming of this native story, when he made his arguments thus to swallow themselves, after destroying each other—but the tail of one of them remains Responding to the 1816 critique, Rowley Lascelles, an English antiquarian based in Ireland, denied the existence of such a story, which he saw as a slur on Kilkenny. Although in 1835 John Neal called the story "one of the oldest and most undoubted Joe [Miller]s", the first edition of Joe Miller's Jests to include it was in 1836 (verbatim from Anthologia). Theodore Hook's 1837 novel Jack Brag jocularly sources the story to [Joe] Miller's History of Ireland.

Elsewhere than Kilkenny An 1817 memoir of the Irish wit John Philpot Curran situates the story in Sligo rather than Kilkenny, as a tall tale told by Curran:

Passing his first summer at Cheltenham ... he had resort to a story to draw himself into notice. ... The conversation of the table turning altogether on the stupid, savage, and disgusting amusement of cock-fighting, he was determined to put an end to it, by the incredible story of the Sligo cats. At [a cat-fight meeting in Sligo] three matches were fought on the first day ... and before the third of them was finished (on which bets ran very high), dinner was announced in the inn where the battle was fought. The company agreed ... to lock up the room, leaving the key in trust to Mr. Curran, who protested to God, he never was so shocked, that his head hung heavy on his shoulders, and his heart was sunk within him, on entering with the company into the room, and finding that the cats had actually eaten each other up, save some little bits of tails which were scattered round the room. The Irish part of the company saw the drift, ridicule, and impossibility of the narrative, and laughed immoderately, while the English part yawned and laughed, seeing others laugh, and sought relief in each other's countenances. In Real life in Ireland, an 1821 stage Irish novel by Pierce Egan, Captain Grammachree, a retired soldier, tells Brian Boru, a young country squire, of a cat-fight in the neighbourhood of Dublin:

'There was hundreds betted, but not a cross won or lost; for by Jasus! they left nothing on the ground but a bunch of hair and two tails!' 'What!' said Brian, 'then I suppose the cats ran away?' 'An Irish cat run away!' sneered Grammachree, 'no; never! by the powers of Moll Kelly! they eat one another up!' An 1830 "dialogue on Popery" by one Jacob Stanley summarises "the Travellers tale of the Irish Cat fight", giving no specific location.

The battle of the cats of Ireland S. Redmond in 1864 in Notes and Queries recounted a tale told to him "more than thirty years" earlier when he was "very young" by "a Kilkenny gentleman", about a battle "some forty years before" [i.e. about 1790] on "a plain near that ancient city":

… excerpt ends here. Continue reading the full article.

Illustrations

Kilkenny cats: "The Eastern Kilkennies — may the knot hold": Puck (1904) hopes the Russo-Japanese War in Manchuria will debilitate both Japan and Russia
"The Eastern Kilkennies — may the knot hold": Puck (1904) hopes the Russo-Japanese War in Manchuria will debilitate both Japan and Russia
Kilkenny cats: 'The Kilkenny Cats; or, Old and Young Ireland "coming to the scratch."' (Punch, 1846) — caricature of William Smith O'Brien and Daniel O'Connell.
'The Kilkenny Cats; or, Old and Young Ireland "coming to the scratch."' (Punch, 1846) — caricature of William Smith O'Brien and Daniel O'Connell.
Kilkenny cats: "About the Size of it" (Harper's Weekly, 1864) — .mw-parser-output span.smallcaps{font-variant:small-caps}.mw-parser-output span.smallcaps-smaller{font-size:85%}General Grant. "Well, and what if it should come to a Kilkenny fight? I guess Our Cat has got the longest tail!"
"About the Size of it" (Harper's Weekly, 1864) — .mw-parser-output span.smallcaps{font-variant:small-caps}.mw-parser-output span.smallcaps-smaller{font-size:85%}General Grant. "Well, and what if it should come to a Kilkenny fight? I guess Our Cat has got the longest tail!"
Kilkenny cats: Detail from First stage of cruelty (Hogarth, 1751) depicting two cats tied and suspended by a rope to fight each other.
Detail from First stage of cruelty (Hogarth, 1751) depicting two cats tied and suspended by a rope to fight each other.
Kilkenny cats: David Claypoole Johnston illustration for Mack's "The Cat-Fight" (1824)
David Claypoole Johnston illustration for Mack's "The Cat-Fight" (1824)

Worked examples

Example 1 — a first encounter with Kilkenny cats

Start with the simplest possible case. Write down what Kilkenny cats claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Kilkenny cats before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Kilkenny cats ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Kilkenny cats

In research
Kilkenny cats appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry
Engineering practice reuses Kilkenny cats in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom
Kilkenny cats is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1807 introductions, Animal cannibalism, Anti-Irish sentiment, so understanding it makes those chapters shorter.
In everyday life
Look for Kilkenny cats outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.
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How to study Kilkenny cats in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what Kilkenny cats means in your own words.
  3. Compare your version with the excerpt and mark what you missed.
  4. Work through the three examples above with pen and paper.
  5. Explain Kilkenny cats out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Kilkenny cats in simple terms?

The Kilkenny cats are a fabled pair of cats from County Kilkenny (or Kilkenny city in particular) in Ireland, who fought each other so ferociously that only their tails remained at the end of the battle. Often the absurd implication is that they have eaten each other.

Why does Kilkenny cats matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Kilkenny cats?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Kilkenny cats.

Tags

  • 1807 introductions
  • Animal cannibalism
  • Anti-Irish sentiment
  • Cats in folklore
  • Cats in popular culture
  • County Kilkenny
  • English etymology
  • Etymologies
  • Fiction about death games
  • Fictional cats
  • Fictional characters introduced in the 1800s
  • Fictional duos

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