Victoire searched also. And nothing was forgotten. Table-legs, chair-rungs, floor-boards, mouldings, mirror- and picture-frames, clocks, plinths, curtain-borders, telephone-holders and electric fittings: everything that an ingenious imagination could have selected as a hiding-place was overhauled.

And they also watched the deputy's least actions, his most unconscious movements, the expression of his face, the books which he read and the letters which he wrote.

It was easy enough. He seemed to live his life in the light of day. No door was ever shut. He received no visits. And his existence worked with mechanical regularity. He went to the Chamber in the afternoon, to the club in the evening.

"Still," said Lupin, "there must be something that's not orthodox behind all this."

"There's nothing of the sort," moaned Victoire. "You're wasting your time and we shall be bowled out."

The presence of the detectives and their habit of walking up and down outside the windows drove her mad. She refused to admit that they were there for any other purpose than to trap her, Victoire. And, each time that she went shopping, she was quite surprised that one of those men did not lay his hand upon her shoulder.

One day she returned all upset. Her basket of provisions was shaking on her arm.

"What's the matter, my dear Victoire?" said Lupin. "You're looking green."

"Green? I dare say I do. So would you look green... "

She had to sit down and it was only after making repeated efforts that she succeeded in stuttering:

"A man... a man spoke to me... at the fruiterer's."

"By jingo! Did he want you to run away with him?"

"No, he gave me a letter... "

"Then what are you complaining about? It was a love-letter, of course!"

"No. 'It's for your governor,' said he. 'My governor?' I said. 'Yes,' he said, 'for the gentleman who's staying in your room.'"

"What's that?"

This time, Lupin had started:

"Give it here," he said, snatching the letter from her. The envelope bore no address. But there was another, inside it, on which he read:

"Monsieur Arsene Lupin,

"c/o Victoire."

"The devil!" he said. "This is a bit thick!" He tore open the second envelope. It contained a sheet of paper with the following words, written in large capitals:

"Everything you are doing is useless and dangerous... Give it up."

Victoire uttered one moan and fainted. As for Lupin, he felt himself blush up to his eyes, as though he had been grossly insulted. He experienced all the humiliation which a duellist would undergo if he heard the most secret advice which he had received from his seconds repeated aloud by a mocking adversary.

However, he held his tongue. Victoire went back to her work. As for him, he remained in his room all day, thinking.

That night he did not sleep.

And he kept saying to himself:

"What is the good of thinking? I am up against one of those problems which are not solved by any amount of thought. It is certain that I am not alone in the matter and that, between Daubrecq and the police, there is, in addition to the third thief that I am, a fourth thief who is working on his own account, who knows me and who reads my game clearly. But who is this fourth thief? And am I mistaken, by any chance? And... oh, rot!... Let's get to sleep!... "