Andrew Christopher Harley - Is the Harley family of South Australia connected to the Bacon family of South Australia?

I found an intriguing connection of the Bacon family of South Australia to the Harley family in Northen Island.
Lady Alice Estelle Harley Hill

However, i can get no further with the tree of Andrew Christopher Harley his parents, even siblings are elusive. But it intrigues me to ponder what the Harley family's ancestry is?

I noted that there's a couple of colonial free settlers on the first fleet in Sydney as well, but I'm not having much luck beyond Andrew Christopher Harley