Hi there,
Can't help with the 1879 Yass inquest, sorry...
But ... back to Forbes, and a James Murphy... There's one who was the Publican for the Criterion Hotel in Lachlan Street, but that's the Gazette of 1880, Pt.3 page 4835 ... so I'm still not sure if I'm helping or diverting your hunt

(Forbes had around 28 pubs in the 1870's ... as per my recollection of social studies, primary school lessons) ...
I'm not finding any WALTERS around in that neck of the woods (along the Lachlan rather than the Bogan

) in the 1870's or later... so they may have gone to Vic in the 1860's ... Gold Fever was a great motivator

Cheers, JM.