john mulvany was born in 1858 in County Antrim. We understand some records are gone but there must be something.
He emigrated we'd say from Ireland into New Zealand between 1858-1864 as he had a permit to work the goldfields from 1865 in Westland, West Coast. Only perhaps he came into Dunedin, Otago as goldfields there also.

I have spent many, many hours, years to find out.

Thankyou
Paul