Thanks for the info, guys. I knew that normally it wouldn't have to be registered here in Idaho, God bless this state, but I didn't know how it worked since my father in law had it registered when ever he bought it. It is in my possession, but it wasn't left to me in a will or anything. He and I were the only gun people in the family, so it just naturally went to me, at the insistance of my mother in law.
The concern was, if the gun is stolen and used in a crime in the future, the police would go looking for my deceased father in law. That would be all that my mother in law needs!! Of course, I worry too much most of the time.
Thanks for your inputs,
Doug