"Ah, Durette!" cried Besnard. "Monsieur Hanaud, I sent Durette this morning round the shops of Aix with the cord which was found knotted round Mme. Dauvray's neck."
Hanaud advanced quickly to the man.
"Well! Did you discover anything?"
"Yes, monsieur," said Durette. "At the shop of M. Corval, in the Rue du Casino, a young lady in a dark-grey frock and hat bought some cord of this kind at a few minutes after nine last night. It was just as the shop was being closed. I showed Corval the photograph of Celie Harland which M. le Commissaire gave me out of Mme. Dauvray's room, and he identified it as the portrait of the girl who had bought the cord."
Complete silence followed upon Durette's words. The whole party stood like men stupefied. No one looked towards Wethermill; even Hanaud averted his eyes.
"Yes, that is very important," he said awkwardly. He turned away and, followed by the others, went up the stairs to the bedroom of Helene Vauquier.
CHAPTER VI
HELENE VAUQUIER'S EVIDENCE
A nurse opened the door. Within the room Helene Vauquier was leaning back in a chair. She looked ill, and her face was very white. On the appearance of Hanaud, the Commissaire, and the others, however, she rose to her feet. Ricardo recognised the justice of Hanaud's description. She stood before them a hard-featured, tall woman of thirty-five or forty, in a neat black stuff dress, strong with the strength of a peasant, respectable, reliable. She looked what she had been, the confidential maid of an elderly woman. On her face there was now an aspect of eager appeal.