Just when you least expect it ...I bought a copy of the new interdemoninational Welsh hymn book on Saturday and was leafing my way through when what do I find but ... Judas and Mary! First line slightly different than the way I do it but that's the folk process! More importantly, I now know who's responsible for at least the tune (and probably the words): Sidney Carter. I should have guessed, really! Anyway, please add that credit to the above.
Interestingly, the Welsh words are completely different (a Harvest Thanksgiving hymn) but written by a minister who spent some time in Toronto ... so I bet that's where he picked it up!
Funny old world!
Sian