"I'll stay for one more drink and then I'm due at the office," he said. "You know, I think this would make an item for the paper." He grinned and nodded toward the pandemonium. When he was gone, I noticed it was getting dark and turned on the desk lamp. Then I saw the curtains. They were all tied in knots, except one. That was tied in three knots. All _right_, I told myself, it was the wind. But I felt the time had come for me to get expert advice, so I went to the phone to call McGill. McGill is an assistant professor of mathematics at a university uptown and lives near us. He is highly imaginative, but we believe he knows everything. When I picked up the receiver, the line sounded dead and I thought, _more_ trouble. Then I heard a man cough and I said hello. McGill's voice said, "Alec? You must have picked up the receiver just as we were connected. That's a damn funny coincidence." "Not in the least," I said. "Come on over here. I've got something for you to work on." "Well, as a matter of fact, I was calling up to ask you and Molly--" "Molly's away for the week. Can you get over here quick? It's urgent." "At once," he said, and hung up. While I waited, I thought I might try getting down a few paragraphs of my novel--perhaps something would come now. It did, but as I came to a point where I was about to put down the word "agurgling," I decided it was too reminiscent of Gilbert and Sullivan, and stopped at the letter "R." Then I saw that I had unaccountably hit all four keys one step to the side of the correct ones, and tore out the page, with my face red. This was absolutely not my day. * * * * * "Well," McGill said, "nothing you've told me is impossible or supernatural. Just very, very improbable. In fact, the odds against that poker game alone would lead me to suspect Nat, well as I know him. It's all those other things...." He got up and walked over to the window and looked at the hot twilight while I waited. Then he turned around; he had a look of concern. "Alec, you're a reasonable guy, so I don't think you'll take offense at what I'm going to say. What you have told me is so impossibly unlikely, and the odds against it so astronomical, that I must take the view that you're either stringing me or you're subject to a delusion." I started to get up and expostulate, but he motioned me back. "I know, but don't you see that that is far more likely than...." He stopped and shook his head. Then he brightened. "I have an idea. Maybe we can have a demonstration." He thought for a tense minute and snapped his fingers. "Have you any change on you?" "Why, yes," I said. "Quite a bit." I reached into my pocket. There must have been nearly two dollars in silver and pennies. "Do you think they'll each have the same date, perhaps?" "Did you accumulate all that change today?" "No. During the week."