“Yes, I do,” said Mr. Penfound, for he had thought of his wife. He spent sevenpence in various good things, and was just gathering his purchases together when the policeman appeared. “Good night, officer,” he called out blithely, and set off to run home, as though for his life. As he re-entered the bedroom at No. 7 his wife sat up in bed, a beautiful but accusing figure. “George,” she said, “where have you been?” “My love,” he answered, “I’ve been out into the night to get you this sausage, and this cake, and this sandwich. Eat them. They will do you good.” MIDNIGHT AT THE GRAND BABYLON. I. Well, said the doctor, you say I’ve been very secretive lately. Perhaps I have. However, I don’t mind telling you--just you fellows--the whole history of the affair that has preoccupied me. I shan’t assert that it’s the most curious case in all my experience. My experience has been pretty varied, and pretty lively, as you know, and cases are curious in such different ways. Still, a poisoning business is always a bit curious, and this one was extremely so. It isn’t often that a person who means to commit murder by poison calls in a physician to assist him and deliberately uses the unconscious medico as his tool. Yet that is exactly what happened. It isn’t often that a poisoner contrives to hit on a poison which is at once original, almost untraceable, and to be obtained from any chemist without a doctor’s prescription. Yet that, too, is exactly what happened. I can assure you that the entire episode was a lesson to me. It opened my eyes to the possibilities which lie ready to the hand of a really intelligent murderer in this twentieth century. People talk about the masterpieces of poisoning in the middle ages. Pooh! Second-rate! They didn’t know enough in the middle ages to achieve anything which a modern poisoner with genius would deem first-rate; they simply didn’t know enough. Another point in the matter which forcibly struck me was the singular usefulness of a big London hotel to a talented criminal. You can do precisely what you please in a big hotel, and nobody takes the least notice. You wander in, you wander out, and who cares? You are only an item in a crowd. And when you have reached the upper corridors you are as lost to pursuit and observation as a needle in a haystack. You may take two rooms, one after the other, in different names, and in different parts of the hotel; the servants and officials will be none the wiser, because the second floor knows not the third, nor the third the fourth; you may oscillate between those two rooms in a manner to puzzle Inspector Anderson himself. And you are just as secure in your apartments as a mediæval baron in his castle--yes, and more! On that night there were over a thousand guests in the Grand Babylon Hotel (there was a ball in the Gold Rooms, and a couple of banquets); and in the midst of all that diverse humanity, unperceived, unsuspected, a poignant and terrible drama was going on,