Mezue ahịrịokwu na-esonụ: Na Jenụwarị 1931, Walker gara nleta na Soviet Union, na-aga International Lenin School na Moscow. Ọ laghachiri Australia na March 1933 ma gbanwee aha ya gaa na Richard Dixon ná mgbalị izere ndị ọrụ nche, bụ́ ndị kpọrọ ya "onye mgbanwe dị ize ndụ". Ọ ghọrọ odeakwụkwọ ukwu nke CPA na 1937. Na 25 Machị 1939 ọ lụrụ Dorothy Jean Button n'ụlọ ọrụ ndebanye aha na North Sydney. A họpụtara ya onye isi oche mba nke CPA na 1948. N'afọ 1945 ọ wakporo iwu White Australia dịka nke agbụrụ na nke na-akpasu iwe, ọ nọchitekwara anya CPA na Petrov royal commission na 1954. Ọ bụ ezie na ọ na-eguzosi ike n'ihe nye Soviet Union, o kwenyere na nnwere onwe nke CPA na 1960s ma ekwenyeghị na
mwakpo a wakporo Czechoslovakia n'afọ 1968. Dixon lara ezumike nká dịka onye isi oche mba nke CPA na 1972 ma nwụọ na 1976 nke ọrịa obi na-arịa ọrịa na Bankstown.