If we can find Henry's death registration, it is likely that document will give information about how long he lived the the colonies, the details of his marriage, the details of his children, information about his parents, his then usual address, his cause of death, his age, his place of birth, his occupation, his place of burial, and other family history information. Yes, some of that info will be already known, but it will help validate our OPs knowledge.
Fingers crossed he died in either Victoria or New South Wales (which at that time was far more extensive geographically than it is now). Their death certs are quite detailed, more like Scottish certificates, whereas South Australia certs are more like English certs.
In fact, as I posted on the other thread, if Mary Anne Davey's 1853 marriage certificate was obtained, it should include details Mary Anne supplied to the clergy confirming her widowhood (and the date of death of Henry !) and the details of her children from her marriage to Henry.... To me that is vital information to help the RChatter community find our OP's Henry.
Cheers, JM