Sentence:  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 <WSD>blackgin</WSD> and not entitled to franchise as Nawnim theoretically would be when he came of age. 
Meaning of the word marked with <WSD> tags:  An Aboriginal woman.