Michael Cullinan works on the rail lines in Port Augusta, South Australia in the late 1870s.
Port Augusta is Nukunu country. It is 310 km from Adelaide.
It was proclaimed on 24 May 1852 by Thomas Elder, named after the wife (Augusta Sophia) of the Governor of South Australia, Henry Edward Fox Young. Augusta was the daughter of Charles Marryat Senior who had been a slaveholder in the West Indies (source: Wikipedia).
Port Augusta was considered the ‘cross-roads of Australia’ since it was the junction of major roads and rail links at the head of Spencer Gulf (source: Wikipedia).