“Strangely enough, it didn’t. Round trip in the interior, we might call it. Well, as I say, I don’t know whether there’s anything in it or not. But I found this.”

With the celerity of a conjurer he produced a small bottle and tossed it over to the girls. It was half full of a white powder.

“What do you think it is?” asked Bundle.

“A white crystalline powder, that’s what it is,” said Jimmy. “And to any reader of detective fiction those words are both familiar and suggestive. Of course, if it turns out to be a new kind of patent tooth-powder, I shall be chagrined and annoyed.”

“Where did you find it?” asked Bundle sharply.

“Ah!” said Jimmy, “that’s my secret.”

And from that point he would not budge in spite of cajolery and insult.