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.