I have just got certificates with further information about William Green.
On Mary Anns marriage certificate, dated 18 Jun 1868, her father William is listed as a publican and they are residing at Tooloor (central western NSW) so I will try to follow up with publican records.
I also have Mary Anns Death Certificate, dated 8 Oct 1914, on this her fathers occupation is listed as Labourer. It doesn't say if he is alive or not.
I hope that publican registrations have a lot more information and that I can find his.
Burrod