The Merry Ploughboys' album was called "Live by the Liffey."
I don't think the following web site existed when I first searched for this song nearly a year ago.
Copied from http://www.merryploughboys.com/ballad/2_01SIS.html

SING AN IRISH SONG
(Donal Cawley)

CHORUS: Sing an Irish song
And raise your glass to praise those days of old.
It's where our hearts belong.
So gather round as our songs and stories [unfold?]

There's couples dancing 'round
To the fiddle's merry sound.
She tingled just as she caught his eye,
And across the evening fields,
As darkness slowly steals,
The stars can hear a lover's sigh. CHORUS

The Gaels are on the seas.
There's hardship in the breeze.
Dan Lynch he's lying cold below.
I've left the county Clare.
The landlord paid my fare.
An exile from famine force to go. CHORUS

A man stood proud and bold
Outside the GPO.
The foreigner his gallant lads did tame.
His uniform we've worn.
A nation was reborn.
This man he set the fire aflame. CHORUS X2