We have an Annie Yarwood on our extended tree, who married David Baxter and died in Western Australia.
Her parents were George Yarwood (d. 1864) and Sarah Elizabeth Shaw (d. 1868).
Unfortunately I don't know who looked after the children after their father, mother and then stepfather died.
I see on your tree that Jonathan L Collingwood was placed into care.
I don't have the level of Ancestry subscription to access the information, but a Walter Charles Yarwood's name is coming up in a search under "Victoria, Australia, Index to the Children's Registers of State Wards, 1850 -1893".
Would that be Annie's brother Walter (William)?
Kind regards, Anne