"No, there you fall into a common error," protested the other. "You may take it that fifty-seven per cent. fall buttered side upward, and only forty-three per cent. buttered side downward."

"H'm," I said dubiously.

"You must pardon me for my officiousness," he went on, "especially as I have now no reason to be interested in such things. But habits are strong."

I looked at him curiously. "Habits?" I said.

"Yes, habits. For years I kept an accurate record of every slice of bread-and-butter I saw fall to the ground. I had better explain myself. Nearly all my life, you must understand, I have maintained the view that the generally accepted theory of the 'cussedness of things' is all wrong. You know that to most people 'cussedness' is the governing factor of life."

"Rather!" I agreed.

"Well, I disbelieved it, and I set to work to collect materials for a book which was to prove my case. For years I incessantly gathered statistics on the subject. Do I bore you?"

"Not at all," I assured him.

"The results were extraordinary. Take, for example, catching trains. It is highly important that you should catch a train at short notice. In nine cases out of ten, you will say, your taxicab breaks down, or your tram is held up by a block in the traffic, or the current fails on the Underground."

"Certainly it does."