Found the following death which is probabvly the one you seek as follows: Digger - 9 South Australian Deaths Registrations 1842 to 1915
Query ----- Surname:sparre (3 matches) Total matching records: 3 --------------------
Surname: SPARRE Given Names: Wilhelm Date: 1890-09-10 Sex: M Age: 59y Status: M Relative: Franz ZENKNER (SL) Relative 2: Residence: Petersburg Death Place: Petersburg District Code: Fro Symbol: Book: 188 Page: 286 Cross Reference:
The relative- Franz ZENKNER (SL) stands for Son in Law. I am from Victoria and know little about towns there.I am not sure if Peterburgh exists, but a telephone call to BDM S.A. on (08) 8204 9599 should help.
I do not have any records on South Australian marriages.