"Yes," said Hanaud, nodding his approval.

"She was quite dead. Her face was terribly swollen and black, and a piece of thin strong cord was knotted so tightly about her neck and had sunk so deeply into her flesh that at first I did not see it. For Mme. Dauvray was stout."

"Then what did you do?" asked Hanaud.

"I went to the telephone which was in the hall and rang up the police. Then I crept upstairs very cautiously, trying the doors. I came upon no one until I reached the room under the roof where the light was burning; there I found Helene Vauquier, the maid, snoring in bed in a terrible fashion."

The four men turned a bend in the road. A few paces away a knot of people stood before a gate which a sergent-de-ville guarded.

"But here we are at the villa," said Hanaud.

They all looked up and, from a window at the corner upon the first floor a man looked out and drew in his head.

"That is M. Besnard, the Commissaire of our police in Aix," said Perrichet.

"And the window from which he looked," said Hanaud, "must be the window of that room in which you saw the bright light at half-past nine on your first round?"

"Yes, m’sieur," said Perrichet; "that is the window."