have originated from the Mus Humiliatus of Central Asia. Now will you gentlemen take the half million?"

"We will!" exclaimed Perkins. "Then may I ask your name?"

"Winifred Willowby."

"Not the one who is reputed to own more United States bonds than any other man in America?" gasped Richard Moyer.

"I won't admit that I do, but I am the man you are thinking about."

"Then I simply cannot understand why you want to mix up in this rat business."

"Simple enough. I am a hundred per cent American. For five generations my people have been born and buried in this city. I own over two hundred million dollars worth of land here. When the dregs of Europe come over to my city and use the rats of Asia to bleed that city white, then I personally protest. I am going to start something. I am not sure what, but when I finish, this city will be practically rat empty and gangster free."

"A large programme, Mr. Willowby," whispered Perkins.

"But I am a large man. Now, suppose I write you gentlemen a check?"

Five minutes later the two partners were alone. Moyer looked at the check, then put it in his pocket, and his hat on his head.

"Suppose we get it cashed?" he said to Perkins. "You can do as you please with your half, but I am going to take my family and go back to England. That man Willowby is only half pint size, but his blue eyes look cold to me, and I bet he plays a stiff game of bridge. If he starts fighting those gangsters, I do not want to be caught on the battlefield."

"How about starting a business over in England?" asked Perkins.

"Not a bad idea. I came over here and together we made half a million selling English groceries to Americans. Perhaps we can make a million more selling American groceries to Englishmen."

Winifred Willowby not only bought the grocery business of Mover & Perkins; he bought a laundry, a small hotel, an apartment house and a theatre. He kept all the old employees, put in a manager, instructed that the weekly tribute should be paid as usual, and then disappeared from New York City.

Ten days later, in Paradise Valley, in the broken country below the Poconos of Pennsylvania, he entertained several men, each an authority in his special line of art or science. They kept the appointment, not being at all sure what it was for, but unable to refuse the invitation which was accompanied in each case with a substantial check. They had all heard of Willowby, but none had ever seen him. No doubt all were rather disappointed at his apparent lack of color and personality. They quickly changed their mind when he started to talk, for there was a man who, when he had something to say, was able to say it briefly and to the point.

"You men are all interested in rats," he began, "and so am I. You have worked with rats in one way or another for a good many years. Perhaps I ought to introduce you to each other. Mr. William Rastell has written the best biological study of rats in the English language. He has done for rats what Beebe did for the pheasant. Now the gentleman next to Mr. Rastell is Mr. Carol Crawford. I doubt if he ever actually saw or willingly handled a rat in all his life, but I am told he knows more about the folklore and traditions of the rat than any other living person. The third of my guests is Professor Wilson. He is the psychologist who has tried to breed different strains of rats, some of superior intelligence and others of the imbecile type. What I want you gentlemen to tell me is why these rats congregate at times in certain buildings of New York City, in such large numbers that they are a serious menace to property and even human life, and, then, as suddenly disappear as they appeared."

"Are they actually doing that?" asked Professor Wilson, who had suddenly become vitally interested in the conversation.

"Suppose they are?" queried Carol Crawford, answering the question for Willowby. "That is nothing more than they have done for centuries."

"Do you mean migratory