These are the parents' deaths
WILLIAMS Eliza
15 Aug 1879 67 years Status Widow Relative James WILLIAMS [Deceased husband]
Residence Adelaide Death Place Adelaide Ade 96/474
WILLIAMS James
6 Jun 1879 70 years Status not recorded Relative not recorded
Residence Adelaide Death Place Adelaide Ade 95/390
WILLIAMS Eliza 67 years
Date of Death 16 August 1879 [Should be date of interment, the header of the database should be amended

]
Section: Road 4
Path Number 10
E/W- W
Site# 2
and at the same location
TUXFORD Eliza Ritchford who was interred on 19 Feb 1884
McMAHON Maria who was interred on 13 Jul 1929
and in the adjacent grave - Site#1
WILLIAMS James 70 years
Date of death 8 Jun 1879 [Once again actually date of interment]
and at the same location
TUXFORD Mary Ann Interred 4 Sep 1875
TUXFORD William Interred 2 Jun 1925
BARLOW Ellen Interred 25 Jan 1926
The Adelaide Cemeteries Authority will amend their records if you notify them of the errors on their database. I usually send a transcribed copy of the death registration and if possible a death and/or funeral notice from the newspaper of the day.
records[at]aca.sa.gov.au
Cando