I don't think that Jack's has been commercially recorded, anyway, which is why I'm closely guarding mine! Dewi Davies went the tune(s) of Men Of Harlech, The Bells Of Aberdovey, Sospan Fach, Cwm Rhondda, Llwyn On, Ar Hyd Y Nos and Fflat Huw Puw - a stunning and marvellous achievement!