Hello Pamela

I know you have been asked a lot of questions that you are looking into, but my big question is how did you establish that John and Isabella Cowin/Kervin/Kewin ( The hand written baptism of Robert in Andreas January 15, 1834 shows mother as Kewin) are Robert's parents ? There are many possibilities, and if the Robert you have found was born February 20, 1834 , he could not have been baptised January 15.
If you google William Corlett , son of John and Isabella , you will get a hit on " Schiavi Cain and Corlett Families - John Corlett" seems to be a NZ/Australia line through Robert's brother William.
It indicates Isabella left 10 Pound Sterling to Robert in her 1851 will , John remarries and when he dies 1859, his children are not named but they get a small inheritance.
There are many IGI User Submitted trees for John and Isabella , and they are all different.
There is another Robert born Andreas around 1832/3 to John and Esther , they are at Kerroo Garroo in 1841 , and this John's will in 1856 when residing at Ballacrebbin , Andreas States Robert was "Now Abroad'

David Dwyer