He nodded.
“The Inspector and I are going to have a look for that black box,” he told her.
“Won’t you want me?”
He shook his head.
“I think you girls have had as much as is good for you of this sort of business,” he declared grimly.
“But it’s all over now,” Lenora protested.
Quest buttoned up his coat and motioned to French to follow him.
“I’m not so sure,” he said. “I’ll ’phone if we want you, Lenora. We shall be at the Professor’s.”
The two men drove to the outskirts of the city almost in silence, while several of the officers followed in another taxi. The Professor’s house seemed more than ever deserted as they drew up at the front door. They entered without ringing and crossed the hall towards the library. On the threshold Quest paused and held up his finger.
“Some one is in there,” he whispered, stepping quickly forward. “Come!”