"Mon Dieu!" gasped my companion, whose name he had told me was Fournier. "This atmosphere is becoming suffocating!"

I agreed, and tried to extinguish the fire within the brazier. Unfortunately I failed to open the lid, which was held down by some spring the catch of which I could not detect.

Indeed, the thin column of blue smoke grew darker and denser, as we watched. The room became full of a perfume which gradually changed to a curious odour which suffocated us.

We both coughed violently, and upon me grew the feeling that I was being asphyxiated. My throat became contracted, my eyes smarted, and I could only take short, quick gasps.

"Let's get out of this," I exclaimed, reaching to open the door.

But it was locked.

We were caught like rats in a trap.

In an instant we both realized that we were imprisoned, and began to bang violently upon the heavy doors of iron-bound and unpolished oak, shouting to be let out. The fool of an Arab had secured us there while he went to announce our visit to his master.

I took up a small ebony and pearl coffee-table inlaid with a verse from the Koran, and raising it frantically above my head, attacked the locked door. But when it struck the oak it flew into a dozen pieces. Fournier took up a small chair with equally futile result, and then in silence we exchanged glances.

Could it be, that on our approach to the house, we had been recognized by the owner and invited into that room which, with its rising fumes, was nothing less than an ingenious death-trap.