Wilsons of Ayrshire

My ancestor was Frederick John Wilson. He was in Australia by 1859 when my greatgrandmother was born. He then went to New Zealand. There was a lot of movement bewteen Australia/ Melbourne & NZ,particularly Otago at that time. Do you know where he went to? I gather there are loads of Wilsons in Dunedin.What did he do?Shipping records are quite good one you start looking at them. R Dunk