I have an idea of what became of your G.grandfather in New Zealand. I am from one of his sons from the second marriage who went on to establish branches of our family in the South Seas namely Rarotonga and Western Samoa. My late father Cuthbert Stanley Heather was from the Samoan connection. We have made contact with our New Zealand branch which has mainly concentrated in the Auckland area, infact Dennett Herser Heather gifted his house to the colonial goverment and is still known as Goverment House Auckland. Dennett made a huge fortune in the shipping of cargo abroad which is how his son ended up in pacific islands - looking after the family business.
To this day there are still Heathers involved in shipping and travel in fact one of our N.Z. cousins Bruce Heather runs a travel consultancy which traces its' history back to the Auckland operation.
Bruce has been trying to trace our roots in England and is working on a family tree, you may have the missing pieces.
Bruce Heather 93 Wilton Road Wilton Wellington NEW ZEALAND
Ph : 064 473 5325
Give Bruce a call I'm sure that he will be as pleased as I am to make contact with you