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.

I rushed into the corridor, and looked through every compartment; but Mr. Watts, whom I was to keep from drunkenness, had utterly departed. Then I made for the handle of the communication cord. It had been neatly cut off. The train was now travelling at a good speed, and the first stop would be Amiens. I was too ashamed of my simplicity to give the news of my loss to the other passengers in the carriage.

“Very smart indeed!” I murmured, sitting down, and I smiled — for, after all, I could afford to smile.