Yes, someone else did say that "cle" means key. I haven't verified it though. And yes the map on the inside is Pennsylvania.
I haven't worked much on any of the treasure hunts lately. That doesn't mean I've quit. I've just been busy with other things. Eventually I mean to get back to the Whistle Pig. Up to this point, I haven't found any thing else that leads me to believe that the key is hidden in Pittsburgh other than what I have already stated. There has got to be more to it.
Keep on checking the forum. You never know what you will find.
I read the posts now and then, but only to keep up on things. I eventually want to jump back into the hunts, and if I don't continue to read, I know I will fall way behind!