(linking to angel's).

I'm a dacint boy, just landed from the town of Ballyfad;
I want a situation: yis, I want it mighty bad.
I saw a place advartised. It's the thing for me, says I;
But the dirty spalpeen ended with: No Irish need apply.
...
Sure, I've heard that in America it always is the plan
That an Irishman is just as good as any other man;
A home and hospitality they never will deny
The stranger here, or ever say: No Irish need apply.
But some black sheep are in the flock: a dirty lot, say I;
A dacint man will never write: No Irish need apply!

John Poole (1862 or 1863). Appears to have been inspired by an song, shortly earlier, by Kathleen O'Neil:

I'm a simple Irish girl, and I'm looking for a place,
I've felt the grip of poverty, but sure that's no disgrace,
'Twill be long before I get one, tho' indeed it's hard I try,
For I read in each advertisement, "No Irish need apply."
...
Now I wonder what's the reason that the fortune-favored few,
Should throw on us that dirty slur, and treat us as they do,
Sure they all know Paddy's heart is warm, and willing is his hand,
They rule us, yet we may not earn a living in their land,
....
Ah! but now I'm in the land of the "Glorious and Free,"
And proud I am to own it, a country dear to me,
I can see by your kind faces, that you will not deny,
A place in your hearts for Kathleen, where "All Irish may apply."
Then long may the Union flourish, and ever may it be,
A pattern to the world, and the "Home of Liberty!"