Celie's ear-drops," and he handed the case back with a thoughtful air.
It was the first time he had taken a definite part in the investigation.

To Ricardo the reason was clear.

Harry Wethermill had himself given those ear-drops to Celia.

Hanaud replaced the case and turned round.
"There is nothing more for us to see here," he said.

"I suppose that no one has been allowed to enter the room ?" And he opened the door.
"No one except Helene Vauquier," replied the Commissaire.
Ricardo felt indignant at so obvious a piece of carelessness.