BigTrev52 on Family Tree Circles

Hello,
I am researching my family tree and writing my Family History for my Grandchildren. My late Grandmother was Adelaide Smithers (nee Cosier). She was born at Molong NSW and raised at Rylestone, south of Mudgee NSW be her grandparents Mathew and Annie Cosier. Her mother, Annie Emma Cosier and Biological father, Henry Rose, were not married at the time so they were sent packing and Adelaide was raised by her grandparents. Her Grandfather was Henry Charles Cosier who was a bit of a lad. I am trying to find out the history of Henry as we are told the Cosiers escaped France during the French Revolution. They started businesses in England and then one set moved to New Zealand. Henry Charles Cosier started many businesses, one involved selling alcoholic cordial but repeatedly went bankrupt. He applied for election to the NZ Canterbury Council extolling his honesty and business acumen!!! He also tried Tasmania and failed again and moved to NSW where he worked at Bathurst before doing 6 months goal time at Inverell for Larceny. He eventually retired at Rylestone.

So, I am very keen to try and track down when and where the Cosiers came to England, and when they came to NZ so, any documents, links or even photos would be much appreciated.
Kind regards

Trevor Ellis.
ps. The attached Tree is not mine, but one that I found on the Web. It is accurate however.