I think if this was my tree I’d first get a copy of John’s probate record, which may include marriage certs and death certs. If no useful information there I’d purchase a transcript of the marriage cert for John T and Sophia:
3776/1890 CHIVERS John T to HARRIS Sophia GOULBURN 
Births: 
14660/1888 Georgina HARRIS parents George and Sophia GOULBURN (Sophia’s first husband) death 11289/1960 Georgina Harris MCMANUS 
14463/1891 John S CHIVERS GOULBURN death 6553/1891 GOULBURN
37263/1893 Sydney James CHIVERS WATERLOO death 13282/1968 BURWOOD
27183/1897 Alice H A CHIVERS WATERLOO death 13282/1968 Alice Harriet Anne WILLIAMS, incorrectly has father as George
Marriages: 
5702/1914 McMANUS Charles W to HARRIS Georgina ANNANDALE 
12050/1919 WILLIAMS Charles G to CHIVERS Alice H A PETERSHAM
7509/1920 CHIVERS Sydney J to MCKENZIE Louisa BALMAIN SOUTH
Sophia’s death and funeral notices only mentions her children, 1st and 4th columns: 
http://nla.gov.au/nla.news-article18032221Jamjar