CHAPTER 11. A CHESS PROBLEM
Poirot and I often dined at a small restaurant in Soho. We were there one evening, when we observed a friend at an adjacent table. It was Inspector Japp, and as there was room at our table, he came and joined us. It was some time since either of us had seen him.
"Never do you stop in to see us nowadays," declared Poirot reproachfully. "Not since the affair of the Yellow Jasmine have we met, and that is nearly a month ago."
"I've been up north—that's why. How are things with you? Big Four still going strong—eh?"
Poirot shook a finger at him reproachfully.
"Ah! you mock yourself at me—but the Big Four—they exist."
"Oh! I don't doubt that—but they're not the hub of the universe, as you make out."
"My friend, you are very much mistaken. The greatest power f
