Guest,
This is one of my all time favorites. It was my understanding that the Rocks of Baun (Bawn) was a reference to the _white_ limestone rocks, in the west of Ireland. The tennant farmers were turned out of their homes & sent to the west-where the land was not tillable because of the rocky grounds. So he'd _never_ be able to earn a living trying to plough the rocks.

Viewed in that context, the song is damn sad.