My, but this is a long running discussion. I have a copy of "The Night that O'Rafferty's Pig Ran Away" dated 1923. I guess it is probably as close to the original as one is likely to get. There are some subtle and some not so subtle differences but I think that generally it is a better version than the one previously published in this thread.

Herewith in full :-

THE NIGHT THAT O'RAFFERTY'S PIG RAN AWAY.

O'Rafferty's pig was a wonderful animal,
Built like a battleship solid and stout,
His ignorance wouldn't disgrace any cannibal,
Impudence written all over his snout.
The night he broke loose there was such a commotion,
Women were screaming and men turning pale,
Running and jumping, colliding and bumping,
And everyone making a grab at his tail.

Mickey O'Toole the heavyweight champion,
Ran at the pig with a big rolling pin,
He hit him a blow but the piggy upended,
And kicked him a buffet right under his chin.
Fat Mrs Doyle she fell in a shop window,
In pickles and jam and red herring she lay,
A dish of tomatoes all over her garters,
The night that O'Rafferty's pig ran away.

He ran into the police court and looked at each visitor,
Kelly with doctoring the butter was charged,
He fought for the case of the local solicitor
Dispersing the judge and the jury at large.
The pig looked at Reilly the principle witness
A resemblance so striking he couldn't withstand
He ran back to the gutter and what with the butter
Was how he kept slippin right out of their hands

Fat Mrs. Doyle she ran like an elephant,
Puffing and blowing all over the mire,
She fell on the ground and begorra the sound,
Was just like the bust of a pneumatic tyre.
Flanagan stopped the pig in a corner,
He jumped on his back and ran into a drain,
At twenty to seven his soul was in heaven,
The night that O'Rafferty's pig ran away.

A bloodthirsty crowd headed by Dennis Cassidy,
Chased him with vengeance from dairy to park,
But didn't they swear when the pig with audacity,
Jumped on a tram and sat watching them walk.
It ran through the legs of old Councillor Duffy,
A man of great standing and lofty ideas,
When they collided old Duffy backsided,
And down went the standing of twenty-five years.

Both wooden legs were broken and shattered,
He lay on his back shouting "doctor I want",
Barney O'Toole said "don't be a fool,
It's hammer and chisel and joiner you want".
Then came the news the pig had been captured,
The town had a thanksgiving properly played,
Ending with bacon and lawfully trading,
The night that O'Rafferty's pig ran away.