This song dates back to the first half of the 19th century, although I have no idea whether it would ever have been sung in America. Reference to Ireland as 'there' may be an indication that it was being written/sung from a distance.

Shamrock Shore

The thread that this links to, which I hadn't seen before, I think is a good example of Mudcat at its best and most helpful, although a number of the major contributors had a bit of a gripe about the length of the list, and the delay in getting feedback they certainly produced the goods on most of the requested songs.

While there are many good songs on that thread I don't think many of the others are relevant to this thread - some are very recently composed songs.