Rambler(i) The manuscript was a collection of handwritten versions, on hand-stitched papers - since vanished.
(ii) I don't recognise the phonetically rendered Irish, particularly - will check it out.
(iii) The Irish Traditional Music Archive is understaffed and under-equipped. I know they would love to be more helpful in cases like this - but it is not practicable.
While I don't now live in Dublin, I'm in the archive fairly regularly and will see what I can find out on this one, when I get a chance. Send me a PM with details of what you would like to check and I'll post a reply here if possible.
Regards