Raggytash seems to have come up with more of the story than anyone else after your original query about Bill's O' Jack's Murder: Poem.
I suspect that the Saddleworth Historical Society website is an labour of love by some dedicated amateur(s) who may not check the email frequently. I'm sure that you will get an answer eventually.
It would be nice if you could share some of the poem here, and say where you found it. How did it turn up in Australia after all these years?