Thanks Ed for the info. The only children I had found for Josiah was Florence, Emma, and Charles Joseph who was my great grandfather. I also have another child Amelia (Minnie) who was 1yr old when they left England. She died in 1951 in Subiaco, WA, Australia. You also have that Amy Palmer died in 1888 but she actually died in 1941. Florence died 1966 and was married to George Hadley Olney. Emma Jane died in 1971 age 91.
I am unsure if Charles Oldaker who was Josiah's father died in Tasmania but I do have that he was born in 1804 and was married to Jane Haynes. Thanks for the help.