“Not a bit of it,” was the reply. “They just sneaked up behind him and stuffed a big handkerchief soaked with chloroform into his face. The drug knocked him out for a short time, but he is all right now. He told me to show you my room as soon as you came, and then to take you to him.”

“Who else is in the house?” asked Nestor.

“No one but Doctor Benson and the servants,” was the reply.

“Then the police have not been called?”

“No, indeed. I asked father to wait until you two came. I don’t take much stock in the cheap plain clothes men they send about on robbery cases. But come on up to my room, and I’ll show you what a sucker I am.”

“If I had said that,” Jimmie put in, “you’d ’a’ handed me one.”

“So Jimmie is on the case too,” laughed Frank. “Well, son, there’s money in it for the man who restores my emerald necklace, which I’m sure to get back, in the end. Why, that necklace has been stolen about a thousand times, and has always been restored to the rightful owner. Once it was found in the heart of Africa, in the kinky hair of a native. There’s blood on it, too, for men have been killed trying to steal it, and trying to prevent its being stolen. It’s the most valuable necklace in the world.”

The boy mounted the staircase as he spoke, leading the others to his room, which was at the front of the house on the second floor, directly over the apartment used by his father as a library, or study. The suite occupied by the boy was elegantly furnished, the only thing which marred the tasty arrangement of the place being a steel safe which stood between the two front windows of the sitting room.

“There,” said Frank, closing the door of the room behind the little party, “they got the necklace out of that safe.”

“How did they open it?” asked the lieutenant, and Jimmie laughed.