hi i am looking for any information about my gt gt grandfather who was born in antrim belfast in 1838 and married a jane lang in glasgow in 1863,they emigrated to dunedin otago nz in 1874 on board the mairi bhan on her maiden voyage with thier two daughters jane and mary ann,my gt gdad was born in dunedin five months after thier arrival.any help finding information about john and his family back in the old country appreciated.