Australian Electoral Rolls...
In 1930 Gwen Flack, home duties, and husband husband Leo Roy Flack, clerk, were living at 46 Cormiston Avenue, Concord.
In 1933 and 1936 Gwen Flack, home duties, and husband husband Leo Roy Flack, town clerk, were living at 75 Wilson Street, Botany.
In 1943 Gwen Flack, home duties, and husband husband Leo Roy Flack, master builder, were at 25 Hastings Road Botany.
In 1949 Gwen Flack, home duties, husband husband Leo Roy Flack, investor, and [son] David Spencer Flack, builder, were at 19 Boonah Avenue, Pagewood.
In 1954 Gwen Flack, home duties, husband Leo Roy Flack (1734), builder, [son] David Spencer Flack, builder, and [his wife] Patricia Joy Flack, home duties, were at 19 Boonah Avenue, Matraville.