I've listened to some of the recording of the song from the 60s and certainly The Clancys (62), The Ludlow Trio (Abbey Theatre, 65) and Campbell(66) all include the I will climb.. third verse. The Clancy's is the earliest I could find apart from the McPeakes, so perhaps they were the ones to add the third verse.

The McPeakes (63) sing only the 2 verses as given above, with the addition of a first verse in Irish as noted by Matthew above.

The sole version I could find from the 60s with pretty much Edith Wheeler's original words was an RTE studio session of Sharon Collen (65). (She was an American I think but sang with Bobby Clancy, a refugee from the brothers). Though Alex Campbell's version has more-or-less the two Edith Wheeler verses with the added third. Most others follow the simplified 2nd verse of the McPeakes, omitting the sing itself to rest bit. And I think all except Sharon Collen, have replaced song with either notes or tune.

I couldn't find a recording of the Corrie Trio with their third verse that Richard gave above. I presume that was their addition.

You can hear all of thes others on youtube:

Clancys at Carnegie Hall, 62
Clancys - The Boys Won't Leave The Girls Alone, 62
The McPeakes - Wild Mountain Thyme 63
The Ludlow Trio - Abbey Tavern, Dublin 65 (lovely singer Margaret O'Brien)
Sharon Collen, RTE Session, 65
Alex Campbell - Been On The Road, 66


I have the transcriptions if anyone is really interested.

Mick