Looking for Mary Power of Ireland Parents Patrick Power Hannah Maher

I am looking for info on Mary Power who was born in Ireland (maybe Waterford). Parents were Patrick Power, a Labourer and Hannah Maher. Mary married Thomas Doocey in Milton New Zealand on the 24th November 1883. her marriage certificate states she was "Full Age" which, at the time was 21. She may have been older. She is my great grandmother.