said Guerchard; and there was a note of incredulity in his voice.
"My having to repair the car myself?" said the Duke.
"Yes, of course," said Guerchard, hesitating a little over the assent.
The Duke dropped the end of his cigarette into a tray, and took out his case. He held it out towards Guerchard, and said, "A cigarette? or perhaps you prefer your caporal?"
"Yes, I do, but all the same I'll have one," said Guerchard, coming quickly across the room. And he took a cigarette from the case, and looked at it.
"All the same, all this is very curious," he said in a new tone, a challenging, menacing, accusing tone.
"What?" said the Duke, looking at him curiously.
"Everything: your cigarettes … the salvias … the photograph that Bonavent found in Victoire's prayer-book … that man in motoring dress … and finally, your break-down," said Guerchard; and the accusation and the threat rang clearer.
The Duke rose from his chair quickly and said haughtily, in icy tones: "M. Guerchard. you've been drinking!"
He went to the chair on which he had set his overcoat and his hat, and picked them up. Guerchard sprang in front of him, barring his way, and cried in a shaky voice: "No; don't go! You mustn't go!"
"What do you mean?" said the Duke, and paused. "What DO you mean?"
Guerchard stepped back, and ran his hand over his forehead. He was very pale, and his forehead was clammy to his touch:
"No … I beg your pardon … I beg your pardon, your Grace … I must be going mad," he stammered.
"It looks very like it," said the Duke coldly.
"What I mean to say is," said Guerchard in a halting, uncertain voice, "what I mean to say is: help me … I want you to stay here, to help me against Lupin, you understand. Will you, your Grace?"
"Yes, certainly; of course I will, if you want me to," said the Duke, in a more gentle voice. "But you seem awfully upset, and you're upsetting me too. We shan't have a nerve between us soon, if you don't pull yourself together."
"Yes, yes, please excuse me," muttered Guerchard.
"Very good," said the Duke. "But what is it we're going to do?"
Guerchard hesitated. He pulled out his handkerchief, and mopped his forehead: "Well … the coronet … is it in this case?" he said in a shaky voice, and set the case on the table.
"Of course it is," said the Duke impatiently.
Guerchard opened the case, and the coronet sparkled and gleamed brightly in the electric light: "Yes, it is there; you see it?" said Guerchard.
"Yes, I see it; well?" said the Duke, looking at him in some bewilderment, so unlike himself did he seem.
"We're going to wait," said Guerchard.
"What for?" said the Duke.
"Lupin," said Guerchard.
"Lupin? And you actually do believe that, just as in a fairy tale, when that clock strikes twelve, Lupin will enter and take the coronet?"
"Yes, I do; I do," said Guerchard with stubborn conviction. And he snapped the case to.
"This is most exciting," said the Duke.
"You're sure it doesn't bore you?" said Guerchard huskily.
"Not a bit of it," said the Duke, with cheerful derision. "To make the acquaintance of this scoundrel who has fooled you for ten years is as charming a way of spending the evening as I can think of."
"You say that to me?" said Guerchard with a touch of temper.
"Yes," said the Duke, with a challenging smile. "To you."
He sat down in an easy chair by the table. Guerchard sat down in a chair on the other side of it, and set his elbows on it. They were silent.
Suddenly the Duke said, "Somebody's coming."
Guerchard started, and said: "No, I don't hear any one."
Then there came distinctly the sound of a footstep and a knock at the door.
"You've got keener ears than I," said Guerchard grudgingly. "In all this business you've shown the qualities of a very promising detective." He rose, went to the door, and unlocked it.
Bonavent came in: "I've brought you the handcuffs, sir," he said, holding them out. "Shall I stay with you?"
"No," said Guerchard. "You've two men at the back door, and two at the front, and a man in every room on the ground-floor?"
"Yes, and I've got three men on every other floor," said Bonavent, in a tone of satisfaction.
"And the house next door?" said Guerchard.
"There are a dozen men in it," said Bonavent. "No communication between the two houses is possible any longer."
Guerchard watched the Duke's face with intent eyes. Not a shadow flickered its careless serenity.
"If any one tries to enter the house, collar him. If need be, fire on him," said Guerchard firmly. "That is my order; go and tell the others."
"Very good, sir," said Bonavent; and he went out of the room.
"By Jove, we are in a regular fortress," said the Duke.
"It's even more of a fortress than you think, your Grace. I've four men on that landing," said Guerchard, nodding towards the door.
"Oh, have you?" said the Duke, with a sudden air of annoyance.
"You don't like that?" said Guerchard quickly.
"I should jolly well think not," said the Duke. "With these precautions, Lupin will never be able to get into this room at all."
"He'll find it a pretty hard job," said Guerchard, smiling. "Unless he falls from the ceiling, or unless—"
"Unless you're Arsene Lupin," interrupted the Duke.
"In that case, you'd be another, your Grace," said Guerchard.
They both laughed. The Duke rose, yawned, picked up his coat and hat, and said, "Ah, well, I'm off to bed."
"What?" said Guerchard.
"Well," said the Duke, yawning again, "I was staying to see Lupin. As there's no longer any chance of seeing him—"
"But there is … there is … so stay," cried Guerchard.
"Do you still cling to that notion?" said the Duke wearily.
"We SHALL see him," said Guerchard.
"Nonsense!" said the Duke.
Guerchard lowered his voice and said with
