Hi again Sunny,
I wonder if the story about the shipwreck is a false one.
I contacted NZ History people and their reply is as follows:
'A Jackson's Bay shipwreck didn't ring any bells, but I have searched the 1990 and 2007 editions of the classic New Zealand Shipwrecks, first published in 1936. The book has to be read with some caution, since it covers (for the main part) only total wrecks - i.e. in which the ship was lost, and accumulated some minor infelicities over its many editions. However, despite it having place entries for long defunct ports, there's none for JB. A search of the left-over West Coast South Island ports failed to produce any reference to anything relevant.
It's possible that a detailed search of the West Coast newspapers on the National Library's Papers Past (
http://paperspast.natlib.govt.nz )
may uncover some strandings or minor wrecks, but I don't think that many lives were lost at JB.'