At the posted coordinates you will find information in relation to the Wada Warung tribe and Bunjil. The Wada Warung were the original occupants of this part of Victoria, and were part of the Kulin nation that lived in central Victoria. According to their beliefs, Bunjil was the Great Ancestral Spirit that created the land and its people.
You simply need to have a read, and answer the following, and then walk (or drive) a short distance to find the cache.
A = the Musk Crow's name (no. of words)
B = in the what? (side panel, two words - no of letters)
C = how many young men did Bunjil summon?
D = the first thing that Bunjil shaped nearby (no. of letters)
E = B
F = A
The Cache is at GZ S38 10.ABC E144 32.DEF
Note the change in minutes!
As ever please keep a lookout for muggles.