There's a booklet from Sean P.OCillin, titled "Ballads of Co. Clare 1850-1976". To my surprise, it prints (with very few changes) the original lyrics Frank has posted on May, 5th, 1998. In this booklet the song is called "The Cross of Spancelhill[sic!]", the correct author is given and as tune "Spancelhill" is given. Does this mean the song was written to a then known tune also called "Spancilhill"?

Wolfgang