You glance furtively at the old man, but he seems to have gone back to his writing, and is paying no attention to you. You try to slip the map into your pocket with the other one, but suddenly he's at your elbow.
'Can I help you?' he asks again, but this time his voice is hard. He's suddenly become very unfriendly and menacing. 'It looks very much like you're attempting to steal from my library. I'm going to have to insist that you return the map immediately and leave this place.'