I turned to unbolt the door, but his sinewy hand grasped me by the neck, and without any further explanation I was half dragged through several dark, close-smelling passages, and down a flight of broken stone steps, until we came to a heavy door.

“At least thou canst tell me who is the owner of this place,” I said, slipping a couple of gold coins into his ready palm.

“I cannot. My mistress hath commanded my silence,” he answered, pocketing the bribe, nevertheless.

“May I learn nothing, then?” I asked.

“No. Our Queen of the Desert hath taken every precaution that thou shalt obtain no knowledge of certain facts. For her own sake secrecy is imperative, therefore, if thou holdest her in respect, seek not to loosen my tongue with thy gold.”

Then he pushed me gently but firmly outside, and with a parting word closed the iron-studded door again. The key grated in the lock as it was secured, and, gazing round, I found myself in the narrow crooked street.

For a few moments I hesitated. The moon shone brightly, and all was quiet, for it was long past midnight.

After a final look at the gloomy, mysterious house, I plunged into the labyrinth of Arab thoroughfares, and, half dazed by the strange, dreamy experience, I walked on, descending the steep, intricate streets, trusting to chance to bring me into the Place du Gouvernement, in the European quarter, wherein was situated my hotel.

At last, after wandering nearly an hour, I found myself in the Rue de la Lyre, the street of the Algerine merchants, and soon afterwards, having awakened the sleepy Arab porter at the Régence, climbed to my room. Opening the jalousies, I sat for a long time gazing out upon the moonlit Mediterranean. The soft warm wind sighed in the waving palms outside, and shouting came up now and then from the quay, for the mail steamer from Europe had just hove in sight. Deeply I pondered over the strange events of the night, wondering whether I was acting wisely in undertaking the long journey to Agadez. So strange were many of Zoraida’s words, that more than once was I tempted to regard her as suffering from mental aberration, yet nevertheless I could not disguise the fact that there was a terrible earnestness in all her words and actions, an earnestness which fully bore out her declaration that her life was at stake.