Hi,
According to AustLii, the case took place in 1933.
Here's a link to the case. It's quite lengthy, but from a reliable source.
Hope it helps.
http://www.austlii.edu.au/cgi-bin/sinodisp/au/cases/cth/HCA/1933/1.html?query=r%20v%20porter
EDIT: Ah, I see someone has beat me to...