I'm not sure on the Catholic Cemetery part, I don't known were my Anna Smith is buried. But I have an Anna Herwig in my Family Tree. She had a number of husbands Hort, Schnabel, Zoumsoil and Smith. Last husband Peter Smith. If this is the right one let me know. I live in Bundaberg, will try and get the info for you.
ps my husbands grandmother was Minnie Herwig, grand daughter of Henry Herwig and Wihelmina Kowalski