“Oh, impossible!”

“Nothing’s impossible,” said Battle. “I ought to have remembered that.”

He sat perfectly still, tapping his knee with his hand.

“Who found it?”

Battle jerked his head over his shoulder.

“Lemoine. Clever chap. They think no end of him at the Sûreté.”

“But doesn’t this upset all your ideas?”

“No,” said Superintendent Battle very slowly. “I can’t say it does. It was a bit of a surprise, I admit, at first. But it fits in very well with one idea of mine.”

“Which is?”

But the superintendent branched off on to a totally different subject.