This site is amazing - very helpful replies, thank you all.
Suzy W = It appears I would have to be in NZ to check out the records. Thank you.
minniehaha = Yes, these are both him. The newspaper article actually confirms what I thought my grandmother told me in 1976 - that the missionary daughter Maud was the eldest. Her descendants have disputed this! Thanks. Every one of my grandmother's anecdotal stories has thus far been confirmed - except his battle in the maori wars.
alamar = He definitely came to Otago from Tasmania to search for gold, having already done so in Bendigo, Victoria twice. But narrowing down when and where he was pulled into militia is the tricky bit.