What a great story and one that I'm sure you will cherish forever. It is wonderful that you have these treasures that remind you of their love and his service. Perhaps I could give you a hand with locating your grandfathers service records and enlistment papers etc? A great percentage of Australian documents have now been digitized and are available for anyone to view. Let me know if I can help with anything, as I have found many interesting notes and documents relating to my Great Grandfather who fought in the First World War.