This time he had no misgivings and congratulated himself upon his professional cleverness in tracking his man down.

The same performance was gone through. A ring at the bell brought an answer to the door.

"Who is there?" said a man's voice.

"It is I ... Sergeant Masson."

The door was opened and a young man stood in the hall. He was about thirty and wore an undershirt and drawers.

"Well, Sergeant!"

The sergeant shrank back; he would have been glad if he could have disappeared in the walls. The chief's secretary stood before him.

"I was ... was looking ..." he stammered.

The secretary interrupted with a smile.

"No, he's not here. In fact, we are rarely found together."