Hi Paul,
Many of my forebears were in the Western Division of NSW for several generations, from around 1870's, some were still there post WWII. eg Louth, Tilpa, Bourke, Cobar, and all through there up to the Qld border ... some were drovers, shearers, skin tanners, miners, policemen, postmasters/mistresses, hotelkeepers etc ....
I have various offline resources that mainly feature those backblocks, but despite looking and looking, I have not spotted Eliza Jane. I will find time over the next day or so to follow the Deignan surname up, as it would be a tad easier than SMITH ...
Much of the Cobar info is found in the Bourke Historical Society's records.
Cheers, JM