Quite well known.
As a lawyer I have read up on the case carefully. My view is that he was guilty of war crimes. However, I do not believe his case warranted execution. There were many other unrighteous killings in that war- and we must remember it was one in which the British invented the Concentration Camp.
I believe Britain chose to set a colonial example to possibly avoid criticism in the UK that would have been caused by executing a Brit. The political back lash in Australia was considerable, and Britain lost the ability to impose the death penalty upon our servicemen over it.
Incidentally, the man was, whilst an excellent bush poet, balladeer, and horseman, a bit of a rogue, and left debt all the way up much of East Coast Australia!