I have struck a dead end with grandfather Alfred Stone - his birth details and parents are very sketchy.

What we do have is as follows;

He was born around 1884/1885 in Collingwood.
His father is believed to be Alfred Stone (same name)
His marriage certificate to Evelyn Pinder in 1910 states his mother was Margaret Owen/s
There is a family tradition that Alfred was adopted or taken in after his mother died not long after his birth.

After extensive searches of the Vic. Pioneer Index we came across your Alfred Stone Unwin. There is a lot of circumstantial data which suggests that this is possibly the same Alfred Stone we are looking for.

You have done a lot of work on Alfred Stone Unwin.

There is a web site - http://www.dvc.vic.gov.au/bdm.htm
where for 90 cents you can view a certificate if you know the year, type and number.
For example Margaret Pye Unwin's death cert 1887 number 14426
could tell you if Alfred Stone Unwin is her son

Long shots sometimes.
I like looking up shipping - http://www.prov.vic.gov.au/access/online.htm
Unassisted found - PYE MARGARET A 9 JAN 1853 VELORE

so now use Velore and 1853 and Pye. Reference fiche 028, page 3 for Velore arrived Jan 1853,
got
Elizabeth Pye 36, Emma Pye 2, Hannah Pye 2, Henry Pye 11, Hester Pye 4, Kezia Pye 25, Margaret A Pye 9, Oliver Pye I, Saml Junr Pye 35, Samuel Pye 6, William Pye 24

So two families, Samuel Pye and Elizabeth with Henry 11, Margaret A 9, Samuel 6, Hester 4, and Emma 2 from Bristol (birthplace when they married)
William Leslie Pye wed to Sep 1849 at Bristol to Kezia Horlick, Vol 11 page 223
William Pye and Kezia Horlick and perhaps Hannah 2 and Oliver infant, have children from 1854, 10 are registered and 7 die as infants

Back to Diggers to 1888 and there is even a death of Elizabeth Robinson 1869 #2538 aged 54 daughter of Posthumous Unknown and David Robinson died at 'Swan'

I was doing Unwin, and decided to add unrelated families, in case they were cousins. That is why your family was included.

I am a grandson of Albert Unwin b. Jun 29, 1883 at Kyabram Vic, Aust. I do not have a lot on my grandfather, just lots of wonderful memories of a rather happy man. I was at Par’s funeral, but I was only about 19 at the time, now I do not remember even the exact date. I remember us going back to the home at 150 Spring St, Preston, where Par had had an extensive garden of mainly vegetables, but guess what, the garden was bare. Apparently he had known of the cancer within him, but being Par, had said nothing. So at 9.30pm on the Monday evening he had said to Nana, “Get me a ambulance …”. Nana apparently replied, “Albert, what would you want an ambulance for ..” . He died later that night on the operating table at Royal Melbourne Hospital