"And there is no way out of this room except through the bedroom?"

"None."

"No secret door?"

"No, my lord. Mr. Judson thought of that and has tapped the walls."

"But the windows?"

"These windows as well as those in the bedroom are fitted with heavy iron bars. Look," he said.

"Who was the last person known to have seen Lord Wilmersley alive?"

"Mustapha. He carried coffee into the swimming-bath at a quarter past nine, as was his daily custom."

"And he noticed nothing unusual?"

"Nothing. And he swears that in passing out through the library he heard the bolt click behind him."