Dorothea Clowes (William Cubitt) was born on 26 Jan 1904 in Augathulia Qld. Aus. She died on 8 Dec 1988 in Sydney.
The Sydney Morning Herald - Tuesday 13 December 1988 p.34
MILLER, Dorothea.-December 8, 1988, formerly of Sydney and Bowral, beloved wife of Arthur (deceased), mother of Josephine and Tony, mother-in-law of Keith and Elizabeth, grandmother and great-grandmother of all their children. Privately cremated.
The death is correct but I can't confirm the birth.