There was a long silence. Then Mr. Haddon asked quietly:
"Could you have been in the safe, Mr. Aldrich?"
David did not recognise whither the question led. "Why, yes," he said mechanically.
Mr. Haddon held out the slip of paper. "According to this memorandum in Mr. Morton's hand, the money was in the safe the day before his death." His eyes screwed into David. "Perhaps you can suggest to us what became of the money."
David stared at him blankly.
"The money—was there—when Morton died!" said Dr. Thorn amazedly. He looked from one man to the other. Then understanding came into his face, and a great relief. "You mean—Mr. Aldrich—took it?"
"I took it!" David repeated stupidly.
He turned slowly to Helen. Her white face, with its wide eyes and parted lips, and the sudden look of fear she held upon him, cleared his head, made him see where he was.
"I did not take the money!" he cried.
"No, of course not," returned Mr. Haddon grimly. "But who did?"