I have received the missive from our changeling guest, and would like to amend my previous letter thusly: Twilight, you are not allowed to run experiments on him without informed consent. You are not allowed to act in a manner which is threatening to his wellbeing - physical or psychological - except to subdue if an escape is attempted. You are also not allowed to permit others to break any of these rules for you because I have not forbidden them from doing so.