Jagged on Family Tree Circles

I don't have a lot of information so I'll give you the story as I know it......

It starts with Joseph GOODSELL, who was born around 1820-1830 in Lancashire, England.
He left England for America but I don't know when. I would be guessing, but the Californian gold rush of 1848-1855 may have been his reason.
Joseph met a woman, Louisa HAMPTON, and it is thought that she was born in California.
We don't know much about Louisa except what has been passed down in story. She was said to be half Native American and half African American.
Joseph and Louisa had a son Walter Thomas GOODSELL on January 15 1859, born in California. I don't know of any marriage or if there were any other children.
In 1869, Joseph and his 10 year old son Walter sailed to NSW Australia, where they settled in the Nowra/Shoalhaven area south of Sydney. I have not been able to find them on any shipping passenger list.
Louisa did not come with them to Australia. Had she already died? Not sure. When Walter got married in 1901, the records show his mother as deceased.

I realise it is a needle in a haystack, but if anyone can help me connect a few dots I would be most grateful.
Louisa HAMPTON has been an unanswered question for a long time.

I am looking for stories on the life and times of Mary Ann MARZOL.
Mary was born in Australia in 1872 to John MARZOL and Christina GRIESINGER in Rocky Mouth, Richmond River NSW....now known as Woodburn.
She was christened Christina after her mother, but was always called Mary.
Her first two children died young.
Her third child Alfred was given away.
She then married Walter GOODSELL in 1901 and they had 7 children.
Mary died in 1923.

Does anyone know my Mary?

jagged.nexus@gmail.com

I am researching the ancestors of William Hamor MORTIMER, born in 1863 in Nether Winchendon, Buckinghamshire, England.
His parents were Robert and Elizabeth MORTIMER (nee HALL) from Twyford, Buckinghamshire, England

William married Fanny BACKSHALL in 1884 in Ardingley, Sussex.
William 22, Fanny 30 and Florence (under 12 months) arrived in Sydney Australia from Plymouth aboard the SS Chimborazo on the 5th July 1885.
They had market gardens at Botany, Sydney.
William and Fanny had 5 children - Florence, Alice, William, Edith and Mary.

After Fanny died in 1907, William married Jessica Agnes AUSTEN and made their home in Burrawang NSW.
William and Jessie had 5 children - Jean, Jim, Joseph, Elsie and Margaret.

He died in 1947.

Any information, whether ancestor or descendant, would be appreciated.