"The chief is wanted at the Station right away."

At these words the door opened wide and the woman stood revealed. She was about forty, dressed in her wrapper and with her hair still in curl papers.

"Louis must go to the Station?" she demanded.

"Yes, Madame, an arrest has been made ..."

"He must go to the Station?" she repeated in a menacing tone.

Sergeant Masson retreated to the landing. He simply nodded his head.

"But he is there! He told me he was! Ah, I see how it is!... He's been lying again. He's been running after women ... all right, he'll pay for it when he gets home!"

The door shut with a bang and the lady disappeared.

"What an idiot I've been," muttered the discomfited sergeant. "I ought to have known better. Of course he's not with his wife, he's with his mistress!"

Several minutes later he reached another apartment in a neighboring street.