A strong possibility Debra. One of the rolls show his details as Wowan, Dawson Valley Railway, carpenter. Perhaps he was building stations and other infrastructure. The disused railway station and good shed survive. Just looks like the lines were removed and the buildings abandoned.
The 1901 death for Walter Frederick Campbell
RAMSEY/RAMSAY was in South Africa. One of the census shows Walter to be a soldier so possibly, if it was him, he was killed during the Boer War. The index only shows initial W. and no further detail. Far removed from heraldic artist which appears to be the occupation on the girls birth certificates but was he accurate with his occupation at that time.
Why did Charles
JOHNSON take a photograph of Elizabeth Jane
DAVENPORT with her husband?
Was she a family member

Were they living at Morinish in Qld
or simply visiting?
Judith mentioned a Charles
JOHNSON, mine manager at Morinish. He died at Rockhampton as a result of an accident at Morinish, in 1891.
Enrolled to vote at Morinish in 1903,1905
BUT were these people already living there pre-Federation?
JOHNSON Elizabeth Morinish Goldfield Domestic duties
JOHNSON Martin Morinish Goldfield Miner
OR she could have been Elizabeth Jane
MACKAY, Elizabeth
HANSEN or Elizabeth
McKENZIE who were also enrolled to vote at Morinish

.
OR none of the above

The architectural style of the home was not exclusive to Queensland.
Cando