[Police] Chieftains

I just bought and am listening to the Chieftains latest CD, "The Wide World Over." It has Mo Ghile Mear on it (which is excellent, as you know). But there's another song, The Magdalene Laundries (with Joni Mitchell on vocals), that reminds me of a Sting song (or perhaps several Sting songs, I can't quite put my finger on it). The music is very familiar. Does anyone know if this is a traditional song or based on another piece of music (as Sting is wont to do)? Maggie