My apologies for not checking my post.
Thanks Kris for modifying for me.
It is Rookwood in Sydney.
I was able to get into the Rookwood Anglican/General Cemetery page earlier.
I did read about Ownership of Graves - however it did not mention where I would be able to find this information.
Thinking about it perhaps if I send an email to the Rookwood Anglican/General Cemeteries Trust, they maybe able to help me.
These burials took place (1st - 1935 - 2nd - 1947 - 3rd - 1949 and the 4th - 1951).
I was able to find the Obituary in the newspaper, for the last person buried, I contacted the Funeral Director, who conducted the funeral, however they never replied to my enquiry.
Seems to be no one wants to know me.
My husband's, great aunt's husband, was living at the same address as the people buried in this grave. That is the only connection that I can make, and this was sometime after his wife died.
The MI on this grave are two (identical ) free standing ones, I think perhaps there could have been an earlier one which was attached.
Possibly some simple explanation?