"I love the Riviera," he said. "I came here first twelve years ago, during the War, when I was sent to Lady Tamplin's Hospital. It was like Paradise, coming from Flanders to this."
"It must have been," said Poirot.
"How long ago the War seems now!" mused Knighton.
They walked on in silence for some little way.
"You have something on your mind?" said Poirot.
Knighton looked at him in some surprise.
"You are quite right," he confessed. "I don't know how you knew it, though."
"It showed itself only too plainly," said Poirot drily.
"I did not know that I was so transparent."
"It is my business to observe the physiognomy," the little man explained, with dignity.