I believe the daughter named “Daisy” in her mother’s 1931 death notice is “Harriett Daisy” born 1892.
In the 1930 electoral roll
Daisie Harriett GRIFFIN – book binder
(living 1 Carlotta St Greenwich, same address as her sister Ethel Swan)
and
Harriett GRIFFIN and Winnifred GRIFFIN (living at 43 Carlotta St Greenwich)
In 1954 electoral roll Daisy Harriett GRIFFIN is still living in Greenwich, still a book binder (so still unmarried then)
GRIFFIN Harriet (Daisy)
Death 10 OCT1955 late of Greenwich
Death notice in Sydney Morning Herald published 12OCT 1955