I read a fair amount and it might not seem as odd a question as you might first think.
Powerline started the speculation ball rolling (in earnest) but I can’t get to the server. Must be Busy.
It was a Free Republic post that is the first known mention.
As someone who was highly involved in the electronic publishing revolution I find the evidence highly interesting even if not completely air tight. (yet)
One thing is for sure… There is “probably cause” to check it out and CBS did not bother.