Hazel, I have looked in Victorian Death Index 1921-1985 and found no SOPWITH of any spelling variation, I also looked for a marriage in South Australia from 1917-1937 but no luck either. You can get a transcription of the death certificate for Magdalene from Joy Murrin Transcription Service which will only cost $15. Her web site is at: http://www.joymurrin.com.au/ That will or should tell you what other children she had. Also if you can get to a Library that has microfilm of newspapers, you may be able to look up the death notices yourself. I know we have the Sydney Morning Herald at our State Library in Victoria. Hope this helps. Regards Joy Light