To be honest, I could be ashamed as I didn’t dare to sing the words out as I think I forgot some of the text … but the tune was fine from both sides, mine and yours. Well, we actually didn’t murmor but sang but in terms of cave echo I don’t know how much we were heard from the others at all. We tried our best though. 
And it was extreamly happy time. I felt happy in deed.
A challenge … next time I’ll be in Postojna cave’s Concert hall, with someone from Cymru or alone, Ill sing the antheme properly and I’ll make someone record it for you all! It has to be heard there echoing across the largest and most acustic hall of the cave system. Agree?
Yes, @ramblingjohn you should in deed be here …