So? Nic Jones says he got it from the Copper Family.

As for Mary Black borrowing from him, so what? That's the way songs are passed on.

Anyway I don't hear where you get that inference.

I vote for Mary's version. The Corries? Neither worse nor better, just different. It's all a matter of preference.

Couldn't find a date, but a search turned up Charles Jeffreys/Sidney Nelson as composers, by the way.