keen eyes scanned the porter with a disquieting penetration.
"I've brought a letter to the Duke of Charmerace, to be given into his own hands," said Bonavent, in a disguised voice.
"Give it to me," said Lupin, holding out his hand.
"But the Duke?" said Bonavent, hesitating.
"I am the Duke," said Lupin.
Bonavent gave him the letter, and turned to go.
"Don't go," said Lupin quietly. "Wait, there may be an answer."
There was a faint glitter in his eyes; but Bonavent missed it.
Charolais came into the room, and said, in a grumbling tone, "A run- away knock. I wish I could catch the brats; I'd warm them. They wouldn't go fetching me away from my work again, in a hurry, I can tell you."
Lupin opened the letter, and read it. As he read it, at first he frowned; then he smiled; and then he laughed joyously. It ran:
"SIR,"
"M. Guerchard has told me everything. With regard to Sonia I have judged you: a man who loves a thief can be nothing but a rogue. I have two pieces of news to announce to you: the death of the Duke of Charmerace, who died three years ago, and my intention of becoming engaged to his cousin and heir, M. de Relzieres, who will assume the title and the arms."
"For Mademoiselle Gournay-Martin," "Her maid, IRMA."
"She does write in shocking bad taste," said Lupin, shaking his head sadly. "Charolais, sit down and write a letter for me."
"Me?" said Charolais.
"Yes; you. It seems to be the fashion in financial circles; and I am bound to follow it when a lady sets it. Write me a letter," said Lupin.
Charolais went to the writing-table reluctantly, sat down, set a sheet of paper on the blotter, took a pen in his hand, and sighed painfully.
"Ready?" said Lupin; and he dictated:
"MADEMOISELLE,"
"I have a very robust constitution, and my indisposition will very soon be over. I shall have the honour of sending, this afternoon, my humble wedding present to the future Madame de Relzieres."
"For Jacques de Bartut, Marquis de Relzieres, Prince of Virieux, Duke of Charmerace."
"His butler, ARSENE."
"Shall I write Arsene?" said Charolais, in a horrified tone.
"Why not?" said Lupin. "It's your charming name, isn't it?"
Bonavent pricked up his ears, and looked at Charolais with a new interest.
Charolais shrugged his shoulders, finished the letter, blotted it, put it in an envelope, addressed it, and handed it to Lupin.
"Take this to Mademoiselle Gournay-Martin," said Lupin, handing it to Bonavent.
Bonavent took the letter, turned, and had taken one step towards the door when Lupin sprang. His arm went round the detective's neck; he jerked him backwards off his feet, scragging him.
"Stir, and I'll break your neck!" he cried in a terrible voice; and then he said quietly to Charolais, "Just take my pocket-book out of this fellow's tunic."
Charolais, with deft fingers, ripped open the detective's tunic, and took out the pocket-book.
"This is what they call Jiu-jitsu, old chap! You'll be able to teach it to your colleagues," said Lupin. He loosed his grip on Bonavent, and knocked him straight with a thump in the back, and sent him flying across the room. Then he took the pocket-book from Charolais and made sure that its contents were untouched.
"Tell your master from me that if he wants to bring me down he'd better fire the gun himself," said Lupin contemptuously. "Show the gentleman out, Charolais."
Bonavent staggered to the door, paused, and turned on Lupin a face livid with fury.
"He will be here himself in ten minutes," he said.
"Many thanks for the information," said Lupin quietly.
Chapter 22 THE BARGAIN
Charolais conducted the detective down the stairs and let him out of the front door, cursing and threatening vengeance as he went. Charolais took no notice of his words—he was the well-trained servant. He came back upstairs, and on the landing called to Victoire and Bernard. They came hurrying down; and the three of them went into the smoking-room.
"Now we know where we are," said Lupin, with cheerful briskness. "Guerchard will be here in ten minutes with a warrant for my arrest. All of you clear out."
"It won't be so precious easy. The house is watched," said Charolais. "And I'll bet it's watched back and front."
"Well, slip out by the secret entrance. They haven't found that yet," said Lupin. "And meet me at the house at Passy."
Charolais and Bernard wanted no more telling; they ran to the book- case and pressed the buttons; the book-case slid aside; the doors opened and disclosed the lift. They stepped into it. Victoire had followed them. She paused and said: "And you? Are you coming?"
"In an instant I shall slip out the same way," he said.
"I'll wait for him. You go on," said Victoire; and the lift went down.
Lupin went to the telephone, rang the bell, and put the receiver to his ear.
"You've no time to waste telephoning. They may be here at any moment!" cried Victoire anxiously.
"I must. If I don't telephone Sonia will come here. She will run right into Guerchard's arms. Why the devil don't they answer? They must be deaf!" And he rang the bell again.
"Let's go to her! Let's get out of here!" cried Victoire, more anxiously. "There really isn't any time to waste."
"Go to her? But I don't know where she is. I lost my head last night," cried Lupin, suddenly anxious himself. "Are you there?" he shouted into the telephone. "She's at a little hotel near the Star… . Are you there? … But there are twenty hotels near the Star… . Are you there? … Oh, I did lose my head last night… . Are you there? Oh, hang this telephone! Here I'm fighting with a piece of furniture. And every second is important!"
He picked up the machine, shook it, saw that the wires were cut, and cried furiously: "Ha! They've played the telephone trick on me! That's Guerchard… . The swine!"
"And now you can come along!" cried Victoire.
"But that's just what I can't do!" he cried.
"But there's nothing more for you to do here, since you can no longer telephone," said Victoire, bewildered.
Lupin caught her arm and shook her, staring into her face with panic-stricken eyes. "But don't you understand that, since I haven't telephoned, she'll come here?" he cried hoarsely. "Five-and-twenty minutes past eight! At half-past eight she
