Hello,
There were Phillips family in Charters Towers who ran business - Sellheim is just outside Charters Towers. You could contact Charters Towers & Dalrymple Faily History Assoc. Inc at P.O.Box 783 Charters Towers 4820 - they have lots of local info. I am not sure if the Phillips are the same family as yours bugt they may be able to tell you.