In the article above, it says L.E. CASEY is brother of Mrs W C KOWITZ.
Doris Isabel CASEY married William Charles KOWITZ in 1935
Doris Isabel CASEY was born 1912 with parents Edward Chaplin CASEY and Eliza Jane RAPLEY
Gladys Mary CASEY was born 1910 with same parents
Gladys married William Charles Hugh McKENNA in 1932
It looks like parents of Leslie are Edward Chaplin CASEY and Eliza Jane RAPLEY
Ros
adding : obit to Edward Chaplin CASEY says he has 3 children
http://nla.gov.au/nla.news-article95477324