I still don't know why the British would imprison Hess instead of negotiating with him and then seeing whether or not it would do any good. Hess wanted to negotiate, so I don't see the value in imprisoning him. Isn't there some kind of code or law or something that you can't imprison someone who is in your territory trying to negotiate peace? The British could only speculate about whether or not such negotiations would bear fruit, but what would have been the harm in allowing Hess to return home and try to make it work? It makes no sense to me.