(Gehn enters from outside)
I'm relieved you've returned. I thought perhaps you had decided against it.
(He holds up the book)
Here. I shall follow you directly. (pause) Please
(When you don't use the book, he closes it and turns away)
You are free to go... but... I think you should not come back unless you are willing to use the book.
(He puts on his goggle and gloves, takes his rifle, and walks out)