Thank you to those who have picked up on my post again. I really appreciate the input. Wilmett (aka Ann) arrived in New Zealand in 1840 - she was very difficult to follow as she married there in 1841, then moved to Sydney, before coming by boat around to Adelaide, South Australia.
I still haven't found anything to support her story of teaching in Ireland, but doubt if I will ever find such evidence.
I have her parents' Will (Devon), and burial records for Newton Poppleford. So not sure there's anything more I could find.
Thanks again, Meredith.