Are you referring to Stephen and Esther who emigrated to Australia, or the James and Esther in previous messages?
What year did Stephen and Esther arrive in Australia? How old were they at the time? Do you have their dates and place of birth? Did their Aust marriage and death certs give their parents' names and addresses? Did their children's birth certs give these details?
[Same questions if they were James and Esther.]

Sue