If you are looking in Australia, try the various state authorities eg for NSW,
https://www.bdm.nsw.gov.au Had a quick look. and found
WALSH WALTER W
Registration number
12727/1885
Father's Given name(s)
EDWARD
Mother's Given name(s)
ALICE
District
ALBURY
also
5625/1913
Groom's Family Name
WALSH
Groom's Given Name(s)
WALTER W
Bride's Family Name(s)
SHANAHAN
Bride's Given Name(s)
FLORENCE M
District
BATHURST so this marriage occurred in 1913, some where near Bathurst.
walter died in 1885,
a lot of information can be extracted from these indexes and you don't have to pay for the certificates,
for Victoria you can use
https://www.bdm.vic.gov.au/
but they are offline as I write.