A John Gosden aged 71 died at Broken Hill, NSW, in 1929. He'd be the right age to be Jane's first husband, who appears to have been born in 1857.
Australian death certs usually show the parents' names; in this case they're not shown in the index, so they may not have been known to the informant. The cert should also show the deceased's place of birth, how long he'd been in Aus, and the names of his wives and children (if known to the informant).
http://www.bdm.nsw.gov.au/cgi-bin/In...h?event=births