The Internet is fantastic for locating people. We use it a lot to trace veterans and then find their families. Often the reverse occurs. All over the Internet I have posted the names of people we are looking for and family members come across these posts.
This is exactly what happened in this case, the daughter of 136273 Wallace Campbell came across our list on the NSW RSL web site and followed the links to me. Today I'll send back Campbell's medals to his family. The medals returned tally is now 478.