There is both a Marong Cemetery and a Bridgewater Cemetery.
No headstone records in either are coming up for a Thomas or Catherine with that surname spelling.http://www.rootsweb.ancestry.com/~ausvsac/Marong.htmhttp://www.australiancemeteries.com/vic/loddon/bridgewater.h...
I see their son Daniel was buried at White Hills cemetery? Where was Daniel born?
Edited to add: Sorry, answering my own question :) I see Daniel was born at Tipperary, Ireland, and married a Catherine Molloy in Victoria, 1869.
When is the last time you can positively place his parents Thomas and Catherine in Victoria?