About a year before the final voyage of the "Julia Ann", on December 3 of 1854, at Ballarat, in Victoria, Australia, the gold miners rebelled at the Eureka Stockade. Here is some history:

http://en.wikipedia.org/wiki/Eureka_Rebellion

And here is a fine song, "The Cross of the South", sung by John Thompson commemorating the event:

http://ozfolksongaday.blogspot.com/2011/05/cross-of-south.html