Blackgin

[…] a man has got to go on day after day, week after week, year after year, fighting devils of loneliness and worse—with nothing to look at except miles and miles of stark staring gum trees and black, smelling gidgee and dead-finish scrub—and never the glimpse of a woman—not counting black gins—to remind him he once had a mother and might have a wife.

Anna was of a lower caste than Nawnim. Her father was a Japanese. Therefore, according to the Law of the Land, which recognized no diluent for Aboriginal blood but that of a white race, she was a full-blooded blackgin and not entitled to franchise as Nawnim theoretically would be when he came of age.