"In what way?" I asked, somewhat astonished.

The train began to move, and she walked to keep level with me.

"Do not let him drink at any of the railway buffets on the journey; he will be met at the Gare du Nord. He is addicted—"

"But how can I stop him if he wants to—"

She had an appealing look, and she was running now to keep pace with the train.

"Ah, do what you can, sir. I ask it as a favor. Pardon the request from a perfect stranger."

I nodded acquiescence, and, waving a farewell to the poor girl, sank back into my seat. "This is a nice commission!" I thought.

Mr. Watts was no longer in his corner. Also my jewel-case was gone.

"A deliberate plant!" I exclaimed; and I could not help admiring the cleverness with which it had been carried out.