Thanks for your comments WCW, as always you make me stop and think.
To answer your questions, yes, he would have called me back. My real H (not the alien) always calls me back, and if one of us is not going to be home in the evening, we communicate that.
I was terribly worried last night, beyond belief. And guess what? He came home about 10:30, drunk. He had been at a bar with the OW's dad, and another guy (both golfing buddies) discussing the drama. Said he didn't call me because he knew I would be pissed.
Poor guy, can't win, can he?
My letter to the OW would not be motive. I did not put anything in the letter that was new or unknown, it was only my closure to her, because I had not spoken to her since I found out the truth. His motive will be that his wife and his best friend had an affair. Not that he is really going to need a motive. If they can't get this guy some help, I know that it will end badly.
I take the whole thing very seriously. I have talked to the authorities and I have removed myself from the situation. I will no longer have any contact with him or her.
I'm sorry that I can't answer your question about salt. We spread salt, but I know there are specific times/areas when chloride must be used. Since your horses will probably be on it you should talk to someone who knows about that. Sorry WCW. I know that we are all trying to keep costs down.
Most of us are about as happy as we make up our minds to be.