Thank you so much kumeyaayindian & Joyful.
It appears that the family arrived between 1845 & 1849.
And that their son Henry doesn't appear anywhere after 1860?!
Henry is 3 years younger than my John Henry Peter but that's entirely possible, so is changing the order of his name I guess... He seems to have been a bit of a shrewd business man here in Australia so I wouldn't put anything past him.
Now I'll enter all that wonderful information and get my head around it all.
Thank you once again, you have both been very helpful!