From the lyrics to this song I immediately thought that the author must have been not only a poet/songwriter but also (like Robert Burns) a Freemason as well, because of the allusions to it (secret signs, true gods of sound and stone, etc.) It sounds as though the author fell in love and shared with her the secrets of the craft (poetical, at least), and suffered by it when she (in his view) subsequently used them to her own advantage before leaving him.

Researching further, I see no evidence of any Masonic membership by the author, Patrick Kavanagh, but there's a very good interview by Colbert Kearney all about the song's origins, here, published in 2010.