Hi Bill,
Don't know if you are still researching your GG history, but I have been researching the King family history for my husband Andrew King.
So far, this is what I have found out about Jane Treasure.
5th Mar 1855 - Jane arrived in Adelaide aboard the "Flora Kerr" with daughter Eliza. She travelled with brother John, his wife and her family.
14th Dec 1855 - Jane married Joseph JACKSON at the Trinity Church, Adelaide. (husband Robert Emery in Jail but was given a pardon conditional on his working in Tasmania)
12th Jul 1865 - Jane married John PARKER at Etteridges Eating House, Port Lincoln.
20th May 1871 - Jane was admitted to the Adelaide Lunatic Asylum suffering from dementia.
22nd May 1892 – Jane died at the Parkside Hospital, Adelaide and was buried at the West Terrace Cemetery, Adelaide.