"You did quite right, Watty. I don't blame you for what happened. The lady must have been a Tartar."

Hugh turned to us.

"It seems to me the lesson for us in this last experience is that we have got to move rapidly if we are going to shake off Teuton's gang," he said. "They are fully as formidable as Nikka warned us they would be. We ought to start for Constantinople this afternoon."

"There's no question of that," assented Nikka. "But what are you going to do with the key to the treasure? You have it in your pocket now, but it is a long journey to Constantinople. Suppose they steal it en route? They may have plenty of opportunities, you know. Personally, I am not sanguine of shaking them off. Then, too, you must remember that Constantinople is the human sink of Europe, Asia and Africa, more so to-day even than before the War. It swarms with adventurers and dangerous characters. The refuse of half-a-dozen disbanded armies make their headquarters there. It will be a simple matter for a gang like Toutou's to waylay you or search your baggage."

Hugh flushed.

"I had thought of that," he said. "Er—the fact is—Jack has a cousin—a girl we both know—"

"You mean you do," I interrupted sarcastically. "I'm only her cousin. Have you heard from Betty?"

"Yes, damn you! She and her father are at the Pera Palace—he's an archæologist-bibliophile Johnny, Nikka, and an awfully good sort."

"And the girl?" inquired Nikka, with his quiet grin.

"Oh, you'll meet her, too. She's very different from what you'd expect in a cousin of Jack. Anyhow, she knows about this treasure business, and she read of Uncle James's murder, and she's most fearfully keen to be in the game with us. My suggestion is that I mail Uncle James's translation of the key to her in Constantinople. Nobody knows that she knows me or has any connection with any of us. She left New York before Uncle James arrived. So it would be perfectly safe in her hands."