Many thanks to you all for this rapid research.
We have a Barron relative living in Aus who has done great research already. But his information on Martin was limited.
What we know as fact is that Martin was born on 29 Jul 1851. He had one older brother, Patrick, who had emigrated to New Zealand in the early 1880s. (No family is known of.) Their mother died in 1856, and their father remarried, so there are many half-siblings.
Patrick, his only full brother, was in the Auckland area of New Zealand, working as a gold miner at St. Bathans. His name did not appear on electoral rolls in 1893, so perhaps he either died or left New Zealand then.
Martin married Margaret (nee Delahunty) on 21 Sep 1875. They had five children, Ellen (1877), Patrick (13 Mar 1879), Thomas (21 Dec 1880), Bridget (26 Mar 1884) and Richard (3 Mar 1887).
When Richard was but a few months old, Martin, Margaret and their five children left their farm on Little Island, Carrick on Suir, Tipperary and emigrated. (Little Island was a farm. To get to the mainland the cattle swam across and Martin followed in a boat!)
Thanks to your research, we know now that he certainly went to Victoria. However, can we find out if his wife and children were with him?
In any case, he seems to have been without children or wife for his time in NZ.
Again, many thanks for all this help. Much appreciated.
Gerry