Your original post requested parents of Joseph HUNTER and his wife Mary DEVLIN.
Summarising: (coz I'm too lazy to keep scrolling to find various pieces of info

)
Joseph's parents:
Henry Hope HUNTERRebecca COWEN, died 1873 Grenfell, 1873; Daughter of Robert and Mary COWEN
Marriage, NSW, 1856, #1679, registered at Mudgee
Henry Hope HUNTER
Rebecca COWEN
Joseph HUNTER, b abt 1859-64 at Young NSW,
lived in: Grenfell 1882, Qld abt 1893, WA by 1897, d WA 1922
There are a couple of what look to be well-researched public trees which give much info re Henry Hope and Rebecca, including photos of register entries. Happy to summarise those but it would probably be better if you have a look at them yourself if you can. You should be able to access Ancestry at a public library or they sometimes have short-term free trial access offers.
Read them carefully though as there are a few discrepancies, and you would need to check carefully but there is so much info there which has good BMD and other records.
Judith