It may be possible that the chap "P Phillips" was related as there were 5 sons to parents of Samuel Phillips b1797, however we do not have any of those details.
Will visit the Molong historical Museum this coming Monday (when it is open)
the name Wolombolong sounds interesting, Wallenbillen may well be the English version, however, with the attempt at sale of the property in 1863/64 it is recorded as "Wallenbillen" as seen in "Trove" paper clips.
I have asked the Bogan shire council, Molong council office, Narromine and Parkes, all without a win, Peak Hill near said location comes under Parkes,
all good fun trying to find stuff in history,,,thanks to all.