"Not only that," said Mask, "but it was brought to me."

"What!" Allen started to his feet, "here! Why didn't you have the man who brought it arrested?"

"Because I could not," said Mask drily; "this is why I told you of my habits. It was after four when Johnstone and every one in the place was away. In fact, it was nearly six, and when I was getting ready to go, that this man came."

"What kind of a man was he?"

"A venerable old man, who looked like the Wandering Jew, with a long white beard, and a benevolent face. He asked if he could speak to me, and we talked. I must remind you that every one in this building is away at the hour of six."

"I understand. But what was the old man's name?"

"He gave none. He simply asked if I had a sum of money in my possession belonging to Mr. Strode. I said I had not; so he asked if Mr. Strode had left a packet of diamonds with me."

"Then there are diamonds!" cried Allen; "and you knew?"

"Now you mention it, I did know," said Mask coolly; "all in good time, Allen. I wished to learn how much you knew before I spoke out. I am a man who keeps secrets, mind you, and I don't say more than is needful. Well, this old man, when I said that I had no diamonds, told me in so many words that I was a liar, and insisted that I should give them up. To test him, I jokingly asked him if he had the wooden hand, which was to be the token to deliver the money or diamonds. He then produced the article."

"Why didn't you arrest him?"