If you have relatives that have moved down-under, you might want to check out Trove.
Trove is an National Library of Australia website that will help you "Find and get Australian and online resources: books, images, historic newspapers, maps, music, archives and more".
When you do a search on the main screen, make sure you check all the sections of results, not just the one in the centre. I saw the digital newspaper results, and almost missed the other sections - books, journals, gazettes, music, diaries and letters, maps, and photos. All this in one search - indeed it is quite a treasure Trove.