Tim,
It's in The Stone Fiddle by Paddy Tunney:

EASTER SNOW

At twilight in the morning as I roved out upon the dew
With my morning cloak around me intending all my flocks to view
I spied a lovely fair one she seemed to be a beauty bright
And I took her for Diana or the evening star that rules the night

I being so much surprised by her it being the forenoon of the day
To see that lovely creature coming o'er the banks of sweet Loughrea
Her snow-white breast lay naked and her cheeks they were a rosy red
And my heart was captivated by the two black eyes rolled in her head

Fair maid I cried, your love I crave for Cupid is a cruel foe
I'll roll you in my morning cloak and I'll bring you home to Easter Snow
Go home, acquaint your parents and indeed kind sir, I'll do the same
And if both our parents give consent neither you nor I will bear the blame

from the singing of Mrs. Brigid Tunney. As the notes in Where the Linnets Sing tell us, the title should really be Estersnowe or Díseart Nuadhan(St. Nuadha's Hermitage).

Brían