Poirot shook his head.

“Very improbable, mon ami. He had no means of disposing of the body. It would have been found by now. Secondly, the open way in which he pawned the ring makes it unlikely that he did murder to get it. Thirdly, your sneak-thief is rarely a murderer. Fourthly, as he has been in prison since Saturday, it would be too much of a coincidence that he is able to give so accurate a description of Lowen.”

Japp nodded. “I don’t say you’re not right. But all the same, you won’t get a jury to take much note of a jailbird’s evidence. What seems odd to me is that Lowen couldn’t find a cleverer way of disposing of the ring.”

Poirot shrugged his shoulders. “Well, after all, if it were found in the neighbourhood, it might be argued that Davenheim himself had dropped it.”

“But why remove it from the body at all?” I cried.