Dorro on Family Tree Circles

I want to contact my cousin, Douglas Hewitt, in New Zealand. He visited my family at Dipton around 1960, and I would like to contact him. He was born around 1935, so time is running out.

Elizabeth Wild Batchelor is in the 1841 England census as 9yrs old, living with Henry Blatch and his wife Sarah, nee Batchelor.In 1847/8 they all immigrated to New Zealand, on the same ship, but Elizabeth is listed seperatly, as a servant. In 1848 she married William Monson, had 2 children and died in 1862.
It has been suggested, she was Sarahs illegitemate daughter, but the name Wild comes from Henrys mother.
How can I find where she came from? I'm running out of options.

Looking for William MACCLURE, arrived in Port Chalmers, Otago on Christian MaCausland, and married Margaret Dinsmore, in 1879.

William MACCLURE arrived in Port Chalmers, NZ on board ''Christian McAusland'' in1871. He married Margaret Dinsmore around 1877. From there, the story is hazy, but they both died in Wellington. Any help would be great

My grandfather, William Lawrence, emigrated to Port Chalmers on the 'Oamaru' in 1879. He married Christina Johnson and they had a son and 4 daughters. She died and grandfather married Helen Mills, my grandmother.
I am having trouble finding the first family, and also what happened to some of the other family.
Any advice, please.