"We will introduce you to him," said Patsy. "and then you may question him as much as you like."

"Oh, no; I prefer not to make his acquaintance until I am quite sure," was the reply. "If he is not Jack Andrews he would be likely to resent the insinuation that he is here trading under a false name. Good night, Mr. Merrick. Good night, Miss Doyle. I thank you for your courteous consideration."

He had risen, and now bowed and walked away.

"Well," said Patsy. "what was he after? And did he learn anything from us?"

"He did most of the talking himself," replied Uncle John, looking after Le Drieux with a puzzled expression. "Of course he is not a jewel merchant."

"No," said Patsy, "he's a detective, and I'll bet a toothpick to a match that he's on the wrong scent."

"He surely is. Unfortunately, we cannot warn Ajo against him."

"It isn't necessary, Uncle. Why, the whole thing is absurd. Our boy is not a gambler or roysterer, nor do I think he has ever been in Europe. Mr. Le Drieux will have to guess again!"

CHAPTER XV

A FEW PEARLS