SIR,"
"My collection of pictures, which I had the pleasure of starting three years ago with some of your own, only contains, as far as Old Masters go, one Velasquez, one Rembrandt, and three paltry Rubens. You have a great many more. Since it is a shame such masterpieces should be in your hands, I propose to appropriate them; and I shall set about a respectful acquisition of them in your Paris house tomorrow morning."
"He's humbugging," said the Duke.
"Wait! wait!" gasped the millionaire. "There's a postscript. Listen:"
"P.S.—You must understand that since you have been keeping the coronet of the Princesse de Lamballe during these three years, I shall avail myself of the same occasion to compel you to restore that piece of jewellery to me.—A. L."
"The thief! The scoundrel! I'm choking!" gasped the millionaire, clutching at his collar.
To judge from the blackness of his face, and the way he staggered and dropped on to a couch, which was fortunately stronger than the chair, he was speaking the truth.
"Firmin! Firmin!" shouted the Duke. "A glass of water! Quick! Your master's ill."
He rushed to the side of the millionaire, who gasped: "Telephone! Telephone to the Prefecture of Police! Be quick!"
The Duke loosened his collar with deft fingers; tore a Van Loo fan from its case hanging on the wall, and fanned him furiously. Firmin came clumping into the room with a glass of water in his hand.
The drawing-room door opened, and Germaine and Sonia, alarmed by the Duke's shout, hurried in.
"Quick! Your smelling-salts!" said the Duke.
Sonia ran across the hall, opened one of the drawers in the Oriental cabinet, and ran to the millionaire with a large bottle of smelling-salts in her hand. The Duke took it from her, and applied it to the millionaire's nose. The millionaire sneezed thrice with terrific violence. The Duke snatched the glass from Firmin and dashed the water into his host's purple face. The millionaire gasped and spluttered.
Germaine stood staring helplessly at her gasping sire.
"Whatever's the matter?" she said.
"It's this letter," said the Duke. "A letter from Lupin."
"I told you so—I said that Lupin was in the neighbourhood," cried Germaine triumphantly.
"Firmin—where's Firmin?" said the millionaire, dragging himself upright. He seemed to have recovered a great deal of his voice. "Oh, there you are!"
He jumped up, caught the gamekeeper by the shoulder, and shook him furiously.
"This letter. Where did it come from? Who brought it?" he roared.
"It was in the letter-box—the letter-box of the lodge at the bottom of the park. My wife found it there," said Firmin, and he twisted out of the millionaire's grasp.
"Just as it was three years ago," roared the millionaire, with an air of desperation. "It's exactly the same coup. Oh, what a catastrophe! What a catastrophe!"
He made as if to tear out his hair; then, remembering its scantiness, refrained.
"Now, come, it's no use losing your head," said the Duke, with quiet firmness. "If this letter isn't a hoax—"
"Hoax?" bellowed the millionaire. "Was it a hoax three years ago?"
"Very good," said the Duke. "But if this robbery with which you're threatened is genuine, it's just childish."
"How?" said the millionaire.
"Look at the date of the letter—Sunday, September the third. This letter was written to-day."
"Yes. Well, what of it?" said the millionaire.
"Look at the letter: 'I shall set about a respectful acquisition of them in your Paris house to-morrow morning'—to-morrow morning."
"Yes, yes; 'to-morrow morning'—what of it?" said the millionaire.
"One of two things," said the Duke. "Either it's a hoax, and we needn't bother about it; or the threat is genuine, and we have the time to stop the robbery."
"Of course we have. Whatever was I thinking of?" said the millionaire. And his anguish cleared from his face.
"For once in a way our dear Lupin's fondness for warning people will have given him a painful jar," said the Duke.
"Come on! let me get at the telephone," cried the millionaire.
"But the telephone's no good," said Sonia quickly.
"No good! Why?" roared the millionaire, dashing heavily across the room to it.
"Look at the time," said Sonia; "the telephone doesn't work as late as this. It's Sunday."
The millionaire stopped dead.
"It's true. It's appalling," he groaned.
"But that doesn't matter. You can always telegraph," said Germaine.
"But you can't. It's impossible," said Sonia. "You can't get a message through. It's Sunday; and the telegraph offices shut at twelve o'clock."
"Oh, what a Government!" groaned the millionaire. And he sank down gently on a chair beside the telephone, and mopped the beads of anguish from his brow. They looked at him, and they looked at one another, cudgelling their brains for yet another way of communicating with the Paris police.
"Hang it all!" said the Duke. "There must be some way out of the difficulty."
"What way?" said the millionaire.
The Duke did not answer. He put his hands in his pockets and walked impatiently up and down the hall. Germaine sat down on a chair. Sonia put her hands on the back of a couch, and leaned forward, watching him. Firmin stood by the door, whither he had retired to be out of the reach of his excited master, with a look of perplexity on his stolid face. They all watched the Duke with the air of people waiting for an oracle to deliver its message. The millionaire kept mopping the beads of anguish from his brow. The more he thought of his impending loss, the more freely he perspired. Germaine's maid, Irma, came to the door leading into the outer hall, which Firmin, according to his usual custom, had left open, and peered in wonder at the silent group.
"I have it!" cried the Duke at last. "There is a way out."
"What is it?" said the millionaire, rising and coming to the middle of the hall.
"What time is it?" said the Duke, pulling out his watch.
The millionaire pulled out his watch. Germaine pulled out hers. Firmin, after a struggle, produced from some pocket difficult of access an object not unlike a silver turnip. There was a brisk dispute between Germaine and the millionaire about which of their watches was right. Firmin, whose watch apparently did not agree with the watch of either of them, made his deep voice heard above theirs. The Duke came to the conclusion that it must be a few minutes past seven.
"It's seven or a few minutes past," he said sharply. "Well, I'm going to take a car and hurry off to Paris. I ought
