Anyway it is a Joker inspired by the book "Holy Terror".
I hadn't read it yet and was speculating about just
what the story would have in it. It is a "priest" that
had the daylights scared out of him, by Batman. His skin
turned a gasthly white, and his lips turned blue. One
look in the mirror and he went insane. Came to the conclusion that this Demon chasing him (Batman) must simply
be a joke played on him by God. So he became the Joker.
When I finally got a chance to read "Holy Terror", the
Dr. Erdel looked a lot like the PRE Insane Joker I drew.
I will scan in the images and load them this evening.