Sonia found the key, and held it out to Guerchard.

He shook his head and said: "There is no reason to search your bag--none whatever. Have you any other luggage?"

She shrank back a little from his piercing eyes, almost as if their gaze scared her.

"Yes, my trunk ... it's upstairs in my bedroom too ... open."

She spoke in a faltering voice, and her troubled eyes could not meet those of the detective.

"You were going out, I think," said Guerchard gently.

"I was asking leave to go out. There is some shopping that must be done," said Sonia.

"You do not see any reason why Mademoiselle Kritchnoff should not go out, M. Formery, do you?" said Guerchard.

"Oh, no, none whatever; of course she can go out," said M. Formery.

Sonia turned round to go.

"One moment," said Guerchard, coming for-ward. "You've only got that wrist-bag with you?"

"Yes," said Sonia. "I have my money and my handkerchief in it." And she held it out to him.

Guerchard's keen eyes darted into it; and he muttered, "No point in looking in that. I don't suppose any one would have had the audacity--"

and he stopped.

Sonia made a couple of steps toward the door, turned, hesitated, came back to the couch, and picked up her cloak.

There was a sudden gleam in Guerchard's eyes--a gleam of understanding, expectation, and triumph. He stepped forward, and holding out his hands, said: "Allow me."

"No, thank you," said Sonia. "I'm not going to put it on."

"No ... but it's possible ... some one may have ... have you felt in the pockets of it? That one, now? It seems as if that one--"

He pointed to the pocket which had held the packet.

Sonia started back with an air of utter dismay; her eyes glanced wildly round the room as if seeking an avenue of escape; her fingers closed convulsively on the pocket.

"But this is abominable!" she cried. "You look as if--"

"I beg you, mademoiselle," interrupted Guerchard. "We are sometimes obliged--"

"Really, Mademoiselle Sonia," broke in the Duke, in a singularly clear and piercing tone, "I cannot see why you should object to this mere formality."

"Oh, but--but--" gasped Sonia, raising her terror-stricken eyes to his.

The Duke seemed to hold them with his own; and he said in the same clear, piercing voice, "There isn't the slightest reason for you to be frightened."

Sonia let go of the cloak, and Guerchard, his face all alight with triumph, plunged his hand into the pocket. He drew it out empty, and stared at it, while his face fell to an utter, amazed blankness.

"Nothing? nothing?" he muttered under his breath. And he stared at his empty hand as if he could not believe his eyes.

By a violent effort he forced an apologetic smile on his face, and said to Sonia: "A thousand apologies, mademoiselle."

He handed the cloak to her. Sonia took it and turned to go. She took a step towards the door, and tottered.

The Duke sprang forward and caught her as she was falling.

"Do you feel faint?" he said in an anxious voice.

"Thank you, you just saved me in time," muttered Sonia.

"I'm really very sorry," said Guerchard.

"Thank you, it was nothing. I'm all right now," said Sonia, releasing herself from the Duke's supporting arm.

She drew herself up, and walked quietly out of the room.

Guerchard went back to M. Formery at the writing-table.

"You made a clumsy mistake there, Guerchard," said M. Formery, with a touch of gratified malice in his tone.

Guerchard took no notice of it: "I want you to give orders that n.o.body leaves the house without my permission," he said, in a low voice.

"No one except Mademoiselle Kritchnoff, I suppose," said M. Formery, smiling.

"She less than any one," said Guerchard quickly.

"I don't understand what you're driving at a bit," said M. Formery.

"Unless you suppose that Mademoiselle Kritchnoff is Lupin in disguise."

Guerchard laughed softly: "You will have your joke, M. Formery," he said.

"Well, well, I'll give the order," said M. Formery, somewhat mollified by the tribute to his humour.

He called the inspector to him and whispered a word in his ear. Then he rose and said: "I think, gentlemen, we ought to go and examine the bedrooms, and, above all, make sure that the safe in M.

Gournay-Martin's bedroom has not been tampered with."

"I was wondering how much longer we were going to waste time here talking about that stupid pendant," grumbled the millionaire; and he rose and led the way.

"There may also be some jewel-cases in the bedrooms," said M. Formery.

"There are all the wedding presents. They were in charge of Victoire."

said Germaine quickly. "It would be dreadful if they had been stolen.

Some of them are from the first families in France."

"They would replace them ... those paper-knives," said the Duke, smiling.

Germaine and her father led the way. M. Formery, Guerchard, and the inspector followed them. At the door the Duke paused, stopped, closed it on them softly. He came back to the window, put his hand in his pocket, and drew out the packet wrapped in tissue-paper.