@indianajones, it means farewell to the maigha a river in ireland its a very old tune, The song was composed in 1738 when Mac Craith was compelled to leave the parish of Croom by the Parish Priest.
He was in an unsuitable and indiscreet relationship with a local girl in Croom, her family objected as he was known as a womanizer.
It was suggested by the Priest that he should leave the area, mend his ways and settle down, I copied that last bit rather than have to write it myself. There are words to the tune as well. Thank yaou both for yaour comments.