Looking for Fineletter Immigration to New Zealand IN 1860s

Hi,
I have information on Hannah Eliza Fineletter, nee Howard having five children born to her and John James Fineletter in Ballarat, Victoria in the 1850s. Three of the five died young. Hannah Eliza Fineletter, Her daughter Sarah Ann Fineletter and perhaps her son, William Thomas Fineletter, emigrated to New Zealand in the late sixties. Hannah Eliza and Sarah Ann were in Hokitika round 1870.
I would appreciate any information on their emigration to New Zealand, and their early years here.
gogilvie