Black Adder is widely recognised to be a thinly veiled representation of Rum Jungle, the area where Xavier Herbert worked as a fettler in the 1920s.

The Oxford Literary Guide to Australia, p. 27

The fictional town of Port Zodiac is based upon Darwin.

Victoria Hotel, built in 1890, is a likely candidate for Princess Alice Hotel, with its large verandah and age. The hotel, which is still operating as a pub and nightclub, is located on Smith Street in Darwin.

The prison compound likely refers to Fannie Bay Gaol at Fannie Bay, five kilometers from Port Darwin.

“Fannie Bay Gaol is rich in social history and one of the Territory's most important heritage sites. Fannie Bay Gaol operated as Her Majesty's Gaol and Labour Prison in Darwin from 20 September 1883 until 1 September 1979.

The original building comprises Blocks A and B containing six cells, and a kitchen and a wash house. The Infirmary was added in 1887 and contains the gallows installed for the last executions held in the Territory in 1952.

A separate cell block for female prisoners was added in 1928, and a watch tower, "native section" for Aboriginal prisoners, kitchen mess building, remand section and two maximum security wings were added during the 1950s.”

(http://artsandmuseums.nt.gov.au/museums/moretosee/gaol#.UdEOufk3CSo)

In Xavier Herbert's original Capricornia, the fictional Caroline River township, from which Red Ochre station is twenty miles away, is likely Adelaide River. Assuming this correlation, Red Ochre is twenty miles from Adelaide River. Coordinates have been given for twenty miles west of Adelaide River and are an approximation.

Given the beach's proximity to Kahlin Compound, it is highly likely that the beach refers to Kahlin Beach, near Cullen Bay, three kilometres north-west of Darwin.

According to Toni Bauman's Aboriginal Darwin: A Guide to Exploring Important Sites of the Past and Present, Kahlin Compound, on which Nowra's is likely based, 'extended from the intersection of Smith and Mitchell Streets with Lambell Terrace to the coast' (88). Coordinates are given for this location.