"Don't vanish for a few days and I won't have reason to spy on you," said as if that's completely obvious. It's Strange's turn to give Childermass a pointed sort of 'what did you think was going to happen' look.

As Childermass props himself up, Strange walks over to the dining area. Grabbing a chair, he pushes whatever was on it onto the floor (hopefully nothing's fragile) and moves the chair over towards Childermass's bed. Sitting down, he starts to listen.

And wait, taken? The confusion is apparent as Strange asks, "Taken? By whom?"