Context: After the First World War, however, it became apparent that the number of mixed-race people was growing at a faster rate than the white population, and by 1930 fear of the "half-caste menace" undermining the White Australia ideal from within was being taken as a serious concern. Dr. Cecil Cook, the Northern Territory Protector of Natives, noted that:

Question: Which race was growing faster after the First World War?
Answer: mixed-race people

Question: What did people fear in 1930?
Answer: "half-caste menace"

Question: What did this menace undermine?
Answer: the White Australia ideal

Question: Who noted this particular fear?
Answer: Dr. Cecil Cook

Question: Who is Dr. Cecil Cook?
Answer: the Northern Territory Protector of Natives,