Referring to his access to decrypted Japanese messages in the Pacific theater, Hazel recalled that he remarked "I can't tell you anything about it, but Japan has just lost the war!

"[2] Hazel stayed in Sydney teaching kindergarten at Naremburn and Roseville public schools and did an arts degree with honours part-time.

In 1942 Hazel married "Ath" at St. Mary's Cathedral, and moved to Melbourne, where she was appointed senior English mistress at Lauriston, a leading private girls' school.

[1] In 1949 the family went to England for "Ath", who had received a Nuffield Foundation fellowship, to do a doctorate on the evolution of the manuscript tradition of the Greek mathematician Pappus of Alexandria.

[1] An Irish-Australian, Hazel Treweek was a deeply committed Roman Catholic, although in later years her views on religious and social issues reportedly became somewhat more liberal.