bjHART on Family Tree Circles

My father in law Robert Hart was born in New Zealand. We only have his fathers name, Solomon Hart.I can,t find any birth records etc. I did find a Robert Hart, that was in the military file recordsfor WW1 N/N Army, but his birth date was 1889, which is 12 years earlier than we have. The rest of the record has a lot of coincidences. Birth date, 6/4,born Auckland, fathers name Solomon,trade or calling, farmers.these are all the same as info we already have on our Robert Hart! His hair colour was listed as the same, and religion same as my husbands. The convincing part was the fact that in the records, this Robert received damages to his Rhand by gunshot wound, injuries to 4 fingers,fingers missing. My husband said his dad had lost second and third fingers. He did not know anything about his dad being in the Army, and had a different story how he lost fingers. This all seems too eerie to not be the same person!! But the problem we have is even on his marriage certificate , he has birth date as 6/4/ 1901. I know with doing ancestry that dates don,t always match, but I don,t know where to go from here!!!?? It appears that his wife and family knew nothing about any of this!!!! I don,t know how I could try to track down the Hart family that came from Bombay area in NZ. We are not even sure when Robert actually came to Australia, but he married in 1936 in Adelaide, and apparently had no contact with family in NZ. His wife didn,t know anything about his family either! When he passed in 1960, she somehow tried to notify any family, but no results! She has also passed now, so can,t ask any questions. I would like to look into this a bit closer. Who do you suggest I could contact in NZ. It all seems very mysterious to me . Hoping you are able to help. Regards Veronica

[admin note: edited the title of this post to make it a question]

I am doing a Wade family tree.This family lived around Dawson, Carrieton, Flinders Ranges, South Australia. I have quite a bit of info, but maybe someone can explain how this family links up with family in Berri, South Australia? I am also confused when it comes to Edward O,Brien Wade, as there are two of them in the family.!Where does the name O,Brien come into it? Hoping someone can help. Confused! Thanks VH