Looking for Information on Ruby Lillian Davill Nee Barrett 1900 1990

Ruby Lillian Barrett (18/3/1900 - 1990) married Howard Keith Davill (1896-1970), son of John Edward Davill(1859-1940) and Mary Stone(1861-1948), on 11th November 1933 at the Wilmington Methodist Church, SA. Ruby was the 3rd daughter of John Barrett (b. c1855) and Caroline Easther (b.1871 Pekina, SA) of Appila, SA, and she had three sisters. I found one reference to a neice, a Melva Barratt/Barrett? Her younger sister Amy married (name unknown), but died before having children.On older sister Bertha married a Harvie, and had a daughter Phyllis. The other older sister Eva married a Freeman, and had a daughter Margaret, or Margaret Louisa.