“Everybody seems to have gone completely mad,” declared Sir Eustace airily. “These young people have been threatening me with revolvers and accusing me of the most shocking things. I don’t know what it’s all about.”

“Don’t you? It means that I’ve found the Colonel. It means that on January 8th last you were not at Cannes, but at Marlow. It means that when your tool, Madame Nadina, turned against you, you planned to do away with her⁠—and at last we shall be able to bring the crime home to you.”

“Indeed? And from whom did you get all this interesting information? From the man who is even now being looked for by the police? His evidence will be very valuable.”

“We have other evidence. There is someone else who knew that Nadina was going to meet you at the Mill House.”