Query on source of Joseph Stanley GARDINER

Margaret's 1916 death certificate shows
Cause of death strangulated hernia and peritonitis. Died in Cairns Street. Described as old age pensioner. Name recorded as Margaret Gardiner. Informant C. Lawrence grand daughter, Forest Road, Peakhurst. Children of marriage:
Charlotte B. age 64
James age 61
Christopher age 53
4 males and 1 female deceased

The children would be

• Charlotte B - Charlotte Ibbotson - Bearns
• James - James Gardiner
• Christopher - Christopher Whitehall
• 4 deceased males

- Henry Gardiner died 1912
- Charles Gardiner Whitehall, infant died 1862
- Thomas Gardiner died 1897
- ??

• 1 deceased female - Elizabeth Gardiner Milton died 1910

If Joseph is her son he would have died between 1904 (last child born 1905) and 1916

NSW Death Records have 2 Joseph's dying in this timeframe

• Joseph S GARDINER - 1907 Sydney - father not listed, mother Mary J
• Joseph H GARDINER - 1916 Orange - father George, mother Mary

Joseph H GARDINER is Joseph Henry GARDINER - https://trove.nla.gov.au/newspaper/article/117818326?searchTerm=jos...

A Joseph GARDINER aged 22 died in 1907, a tram guard - https://trove.nla.gov.au/newspaper/article/115231774?searchTerm=jos...

The children of Joseph Stanley Gardiner have records listing their parents as James and Rachel

NSW Birth Record
GARDINER MARION R
Registration number
10065/1893
Father's Given name(s)
JAMES
Mother's Given name(s)
RACHEL
District
CANTERBURY

NSW Birth Record
GARDINER CECIL F
Registration number
4091/1895
Father's Given name(s)
JAMES
Mother's Given name(s)
RACHAEL
District
HURSTVILLE

GARDINER WILLIAM R J
Registration number
22234/1896
Father's Given name(s)
JAMES
Mother's Given name(s)
RACHAEL
District
HURSTVILLE

GARDINER SYLVIA J
Registration number
34020/1905
Father's Given name(s)
JAMES
Mother's Given name(s)
RACHAEL
District
HURSTVILLE

This would be James GARINER and Rachael ELLIOTT who married in 1892

Registration number
6517/1892
Groom's Family Name
GARDINER
Groom's Given Name(s)
JAMES
Bride's Family Name(s)
ELLIOTT
Bride's Given Name(s)
RACHAEL
District
RANDWICK

Hi
I spent a few hours trying to find info on him - no birth, death or marriage in NSW. Perhaps he was from interstate or overseas.

Was there any other info on her death certificate that may assist? What is the source for her birth date?

The children that were listed as her siblings are the children of James and Rachael - I have moved them all to their correct place (and added sources) except for the private incorrect sibling.