Mbo, I'm not all that convinced that Pete St. John or the family claiming ownership of those two songs is valid, despite what the legal begals say.I believe they are both "Traditional", whatever that really means.
I believe both are old songs, whether in the case of the MacPeakes they modified more extensively than Pete St. John.
I suppose that someone will claim the Water is Wide and Carrick Fergus, and such songs.