Hi there,
Red Post, I see Debra and Judith are both also alerting you to "Constance"
From the NSW BDM online index, Phobe S BEVAN married George ROSTRON in 1884, and the marriage was registered for NYMAGEE, the reference no. #4743.
From the NSW ER 1903, THE DARLING, polling at Nymagee
ROSTRON Phoebe
Constance, at Tara Station, at her domestic duties
BEVAN, James Says, Nymagee, cook
BEVAN, Rosa Bolton, Nymagee, domestic duties
BEVAN, William Says, Nymagee, labourer
NO sighting of George Rostron enrolled to vote at Nymagee.
Relying on my memory, I think that Nymagee is about 60 miles south east of Cobar.
Chezza60, please have another good look at Phoebe's m.c. and confirm if her middle initial is "S" or if it is "C", if in any doubt, (the late 19thC handwriting can be full of flourishes and difficult to read) please consider posting a snip of a section on the RChat decipher board at this link :
http://www.rootschat.com/forum/index.php/board,425.0.htmlMy friend has returned my phone call, she transcribed some of the marriages in the Coonabarabran district, but none in the Nymagee district.
So, you have some choices
a) don't try to establish detail for Phoebe's parentage/birthplace from her mc
b) contact the C of E to establish where the parish record from Nymagee's C of E is currently held
c) contact a family history group from that area to see if they know of the location of those parish records, or if they hold transcripts from the local parish register
My usual starting points would be Mr Google is your friend ...

Cobar Shire Library
http://www.cobar.nsw.gov.au/our-town-and-shire/library they would know of the family history group's contact details. I think the group out there is known as Cobar Genealogy Group Inc.

Anglican Church Diocese Of Bathurst Cobar, Barton Street, Cobar, NSW 2835
The Diocese of Bathurst Cobar is very extensive, covers more than Dubbo Orana, North Western NSW, Outback NSW
Cheers, JM