Found it! Well, now I see why Charlie reworked it:

Ye Landlords of Ireland (original)

("Mick Brennan was born at Birriwa in 1892. His father was an Irish immigrant who was particularly proud of the fact that he had not been assisted in any way in coming to Australia. Mick worked as a shearer most of his life. During his youth at Birriwa he learned 'Ye Landlords of Ireland' from an Irish-Australian named Wild." from FOLKSONGS OF AUSTRALIA, pp. 224-225)

I went unto America, that sweet land of the free,
But in short years after I returned
Back to my native land;
To hear the news the good priest told to me,
It caused my heart to mourn –
My mother in the poorhouse died
And I had crossed the sea.
It was then a fearful venom seized me;
With my right hand to my bosom,
With my left hand raised on high,
I swore by my creator,
That that cruel 'victed (evicting) landlord
He must surely die;
The night was dark and stormy,
The trigger drew, the tyrant slew,
His soul I sent to Hell!
That turned me to a wanderer
Far from my native land;
That when the day of judgment comes,
When all our race is run,
May God forgive the venom shown
By that poor old widow's son;
So, you landlords of Ireland,
No matter where you be,
Oh, meet your fate as he did
And old Ireland will be free.

The American lands are helping,
Their eagle, gold and wings,
And the harp of dear old Ireland's
Just a mass of broken strings.

Regardless,
Landlady's Daughter