WANTED: Irish songs for female singers.

Specifically, two singers, one an alto and the other a (low) sorpano. (I still don't believe her. I'm not a soprano, but her voice is lower.) Margaret also plays the guitar. We're looking for songs to sing at a local session (NY), that is predominately musicians--last week there were four accordians! Most of the songs sung there are typical, sing-along stuff, like "Black Velvet Band" and "Wild Irish Rover." We're looking for songs that are (possibly) traditional, older, not as well known, more stand alone type stuff. (There's a singer who does "Shoals of Herring"--what a great song!) Anybody have suggestions? Things we can get ahold of words and music for? Any and all will be much appreciated. Thanks.