"What do you demand of me?"

"I have told you once before—a clear and concise account of all you know about the diamond robbery in Mr. Frick's house six years ago."

There was again a pause for some seconds. The Englishman then threw his cigar on the floor with an oath. "You can put the questions, and I will answer. But it must be also understood that you take no proceedings against me for any part in the case."

"It is very wise of you to make that condition. You have deceived the court, and committed perjury. It would cost you many years of your liberty if the arm of the law reached you. But we undertake not to proceed against you, if you will provide us with proof that Miss Frick, as she was then, had nothing to do with the robbery."

"Very well, I am willing. Ask, and I will reply."

"Who was it you photographed in the museum in front of the cupboard with the black diamond in her hand? I mean the photograph which you later on handed over to the court."

"It was the maid,—Evelina Reierson; wasn't that her name?"

"And you saw that she took the diamond and went away with it?"

"Yes."

"Was it quite accidentally that you happened to take the photograph? It was taken from the reflection in a mirror, was it not?"