source: P W Joyce, Old Irish Folk Music and Songs (1909)
The first and last verses are essentially the same as in the version above and verse 2 is like verse 4, but set in Cork rather than Dublin.
The AA in the title is not a typo, but Joyce's way of representing Á.

DRAHAAREEN-O MOCHREE (DEARTHÁIRÍN-Ó MO CHROÍ): LITTLE BROTHER OF MY HEART

I am a young fellow that always loved rural sport;
The fairs and the patterns of Erin I used to resort;
Where true pleasant comrades were always my company;
Until I was deprived of my deartháirín-ó mo chroí.

From the cove [Cobh] of Cork my brother he sailed away,
On board of a warship to cross to Spain by sea.
Where cannon roar loudly and bullets like lightning fly,
Perhaps in the battle my deartháirín-ó does lie.

The womb turned to earth that gave birth to my brother and me,
My father and sisters are gone to eternity;
My brother enlisted and went o'er the raging sea
And he left me here lonely - my deartháirín-ó mo chroí.

If Heaven would aid me and send me to Spain where he be,
My life I would venture to set him at liberty;
Like a true loyal brother I'd fight for him manfully,
And die in the arms of my deartháirín-ó mo chroí.