In Melbourne find Doctor Anderson (HUNT ANDERSON), ASK DOCTOR SICK WIDOW, he asks you to find a benefactor for her.
Find Andrew Stuart who should be at 'The Foyer of a Country Villa' (or HUNT STUART), ASK STUART SICK WIDOW and he will give you a note for Dr. Anderson.
Return to Doctor Anderson, GIVE NOTE ANDERSON, he will now follow you.
Go to Mrs. Mackenzie at 'Mrs MacKenzie's Cottage', she is cured and will give you a tiny silver charm on a chain
Credit: <a href="http://www.legenddb.com">LegendDB</a>