The first "b" part or chorus is:

And blind man O'Carolan where is your monument Build it so high that the world it can see All the people now have their music thro' a blind harpist that's helped them to see

That part is written in musical score in the book. As I look at the rest of the song, which is just written below the score, it does indeed show to be a bit confusing. Based on the sentence structure it seems to indicate that it stays with the "A" part until you reach the last verse:

And blind man O'Carolan He was your monument He built it so high that the world it can see And through O'Riada we can be thankful He's shown us a blind man that's helped us to see

I haven't heard a recording of the Furey's doing this song, so I can't say for sure if they intended for the first "B" part to be repeated every couple of verses or not. Now you have me intrigued and I am going to find a CD of the Furey's so I can hear it. And the score shows the song being done in the key of D.

All the best,

Mick