I raised my eyebrows.

“My dear Tuppy, you are not showing your usual good sense in this Angela-chap-at-Cannes matter. If you will forgive me saying so, you have got an idée fixe.”

“A what?”

“An idée fixe. You know. One of those things fellows get. Like Uncle Tom’s delusion that everybody who is known even slightly to the police is lurking in the garden, waiting for a chance to break into the house. You keep talking about this chap at Cannes, and there never was a chap at Cannes, and I’ll tell you why I’m so sure about this. During those two months on the Riviera, it so happens that Angela and I were practically inseparable. If there had been somebody nosing round her, I should have spotted it in a second.”

He started. I could see that this had impressed him.

“Oh, she was with you all the time at Cannes, was she?”

“I don’t suppose she said two words to anybody else, except, of course, idle conv. at the crowded dinner table or a chance remark in a throng at the Casino.”

“I see. You mean that anything in the shape of mixed bathing and moonlight strolls she conducted solely in your company?”

“That’s right. It was quite a joke in the hotel.”

“You must have enjoyed that.”