Thanks, Louise- I have a Addison World history record from about 1993 which lists about 700 Addison households in Australia ( out of 10,000 World wide )
I once checked the list of the first and Second Fleet convicts and there were none there !I would think 1838 was quite early for Free settlers for your descendant to arrive - I would claim him as the first Addison to arrive here in the absence of any other claims. My Family were Farmers in Lincolnshire at this time - I can go back to around 1770.
Hope you have fun with this subject . Regards , Brian addison ( 1977 arrival)