Sir Thomas had staggered to a chair.
"So, that was how you knew!" he said.
"That was—" began Jimmy, when a sudden suspicion flashed across his mind. He scrutinized Sir Thomas' pallid face keenly.
"Did you know?" he asked.
He wondered that the possibility had not occurred to him earlier. This would account for much that had puzzled him in the other's reception of the news. He had supposed, vaguely, without troubling to go far into the probabilities of such a thing, that the necklace which Spike had brought to him had been substituted for the genuine diamonds by a thief. Such things happened frequently, he knew. But, remembering what Molly had told him of the care which Sir Thomas took of this particular necklace, and the frequency with which Lady Julia wore it, he did not see how such a substitution could have been effected. There had been no chance of anybody's obtaining access to these stones for the necessary length of time.
"By George, I believe you did!" he cried. "You must have! So, that's how it happened, is it? I don't wonder it was a shock when I said I knew about the necklace."
"I have something to say to you."
Sir Thomas tried to rally. There was a touch of