Do

L was impressed. He knew that Mr Ferrars had not been feeling well for some time. (But, that shouldn't really come as a surprise. What do you expect from an old man whose diet is nothing but beer and potato chips?)

"Professor, I suppose you are right. What should we do?"

"Brilliant. I am exactly the expert in this kind of matter," Y said eagerly, "First, you should lock up the front door of the King's Paddock so that no one could get in and out of the building. Make sure all people in that house wash their eyes before and after they meet anyone. Em... above all, get a pubic hair from everyone - if it sinks into the water, this person is possessed by Satan!"

"These are really drastic measures. Em... professor, may I ask how does eye-washing help? I suppose Satan is within our soul and does not move from one person to another by looking at each other?"

"Don't be afraid; just believe."