Colonel Melrose took a key from his pocket, and unlocking the door which led into the lobby, he ushered us through into the study.

“Except for the removal of the body, M. Poirot, this room is exactly as it was last night.”

“And the body was found—where?”

As precisely as possible, I described Ackroyd’s position. The arm-chair still stood in front of the fire.

Poirot went and sat down in it.

“The blue letter you speak of, where was it when you left the room?”

“Mr. Ackroyd had laid it down on this little table at his right hand.”

Poirot nodded.

“Except for that, everything was in its place?”

“Yes, I think so.”