Thorn smiles. He has sharp teeth.

"Stay here. Think very hard about how I can seamlessly send you to fetch Promise securely without unwelcome wrinkle or unplanned contingency. If anything happens which requires prompt attention lest you die or be otherwise lost to me, such as you biting off your own tongue as a result of your very much operative standing order, tap on your door twice. Someone will attend to you; they will be authorized to kill you in whatever way is most convenient or amusing for them if that seems more expedient than saving your life."

And Thorn goes out of the room and shuts the door.