“You shut up the windows and doors the night before. Did you fasten all the windows?”

“Yes.”

“Were they all fastened this morning?”

“Yes.”

“You have a maid who has a sweetheart? I think that you remarked to your uncle last night that she had been out to see him?”

“Yes, and she was the girl who waited in the drawing-room, and who may have heard uncle’s remarks about the coronet.”

“I see. You infer that she may have gone out to tell her sweetheart, and that the two may have planned the robbery.”

“But what is the good of all these vague theories,” cried the banker impatiently, “when I have told you that I saw Arthur with the coronet in his hands?”