Ron,
A great figure in the game we love dies and you're compelled to question whether he wrote while drunk? You're better than that, kind sir.
I detected a tone in his writing and sought clarification from a discussion group that I respect. Consider that the letter was sent from Hannigan to Shackleford; as a "please publish me" missive or a casual epistle? That's very intriguing to me, Terry. But it gets more intriguing, still.
There are at least a half-dozen grammatical/spelling errors, very unlike Frank Hannigan. He wrote flawlessly, just as he spoke when on television. Then consider how he bounces around from topic to topic, again very inconsistent with his modus operandi.
All of this adds up to a great mystery to me. I'm quite surprised that my inquiry brought such a reaction. Do others feel as does Terry?