Sentence:  Diana was a black <WSD>quadroon</WSD>, her father being a blackfellow. / He was the father of four <WSD>quadroons</WSD> who were regarded as half-castes because the lighter part of their mother's blood was Asiatic, and he was only too well aware of what their future would be should he desert them. 
Meaning of the word marked with <WSD> tags:  A person of three-quarters Aboriginal descent and one quarter Caucasian descent; a person of one quarter Aboriginal descent.