Thank ya'll, especially Little Robyn, for your leads. I will pursue them.
To answer a few questions. I mean English language songs of the Anglo/Celtic sort that have been preserved through oral transmission by New Zealanders. They can be by known or unknown authors. Many Wood Guthrie or Stephen Foster song, f'r instance,have definitely passed into the folk river even tho we know very well who penned them
They need not be about New Zealand. Are all Irish folk songs about Ireland? Just so long as were/are sung on NZ soil. I xpect there are to be a lot of songs from English, Irish,and Scottish roots. That doesn't disqualify them, everything comes from somewhere. Barbara Allen is an English song, and an Appalachian, Ozark, Vermont, New Jersey, Wyoming and a Missouri song and more
I'm not really interested in Maori music(xcept for where it's intermingled with white people's music) for the same reason I'm not interested in learning Native American music. It's too far outside of my frame of reference. It's not my culture, it's not my language, and it would very presumptuous of me to attempt to sing them.