This verse was entered in a forum thread some time ago:

In the far fields of India, 'mid war's dreadful thunders
Her voice was a solace and comfort to me
But the chill hand of death has now rent us asunder
I'm lonely tonight for the Rose of Tralee

Try a forum search on Rose of Tralee for more info (the Forum Search doesn't work on my computer, I had saved the extra verse in my text copy of the song) but I'm pretty sure no source was given for this verse. I'm pleased to learn that it isn't in Levy's sheet music, because it's pretty morbid compared to the first two verses and hits you like a hammer at the end of the song. I'm glad to have a clear conscience about leaving it out.

Not being in the sheet music doesn't mean too much, in one sense. Copyrights were violated right and left and this kind of parlor song was shamelessly pirated and revised. So take your pick. - Rita F