“Yes, I learned them years ago when, in my youth, I accompanied the ivory-traders from Agadez far south, even unto the banks of the mighty Congo.”

“And the route we are following. Whither will it lead us?”

“To the Niger, where dwell the pagans,” he answered. “At the river bank I shall leave thee to return to my home.”

“In thy wanderings in the south thou hast, I suppose, witnessed many strange things,” I said, knowing the long, tedious journeys performed by ivory caravans.

“For ten weary years I travelled through desert and forest,” he answered, “and many strange peoples and strange countries of the pagans have mine eyes beheld.”

“Yet, during thy travels, hast thou never discovered the Rock of the Great Sin of which the wise men tell?” I asked. It was evident Azala had not disclosed to him the object of my quest, therefore I was determined to ascertain what he knew regarding the strange legend.

The old man laughed, shaking his head.

“Mine eyes have never been gladdened by its sight, although many are assured that the rock actually existeth, and hideth some wondrous marvel. In twenty lands the conviction is current that the Rock of the Great Sin is more than imaginary. That it existeth, though none can tell where, I have with mine own ears heard from the negroes on the Dua river, as well as those who live in the forests of far Buraka. In Dahomey, in Yorouba, in Foumbina, in the country of Samory, in the desert of the Daza, and in the great swamps of Zoulou beyond Lake Tsad, the same popular conviction existeth as firmly as among our own people. The pagans, while believing as implicitly as we of Al-Islâm that the rock is unapproachable, are also imbued with an idea that the very air in its vicinity is poisonous, and to this attribute the fact that nobody has been able to approach sufficiently near to take observations. In Gourma the negroes declare that the rock is by night and day enveloped in a dense, black smoke which veileth it from all human eyes, for their fire-god resideth there and hideth himself in its wondrous fastnesses. The Bedouins of the Digguera entertain a firm-rooted conviction that the river Al-Cawthar and the paradise of those who fall valiantly in battle lieth beyond the mystic rock; the Bazou of the Marpa Mountains, on the other hand, maintain that the rock is the centre of the earth, that it is hollow, and that those who betray their friends, or who attack their blood-brothers, go therein to dwell in fearful torment, while the Kanouri and the Tuaregs declare it to be the abode of all the prophets, martyrs and saints of Al-Islâm, who, though believed to be dead have been transported thither unseen. They say the faces of the holy men are blooming, their eyes bright, and blood would issue from their bodies if wounded, and further, that the Angel Israfil watcheth over them, ready to sound the great trumpet on the last day. These, and hundreds of such quaint beliefs have been related to me by negroes, wise men and story-tellers in the course of my wanderings, but the Rock of the Great Sin itself no man hath ever set eyes upon, and I should regard as a maniac any person who went forth expecting to discover it.”

“Why? Are there not many regions still unknown to men?” I asked.

“Truly, but our perspicuous Book telleth us that what Allah hath hidden man should not seek,” he answered, piously. “For centuries many have, out of curiosity, sought the strange rock which pagans believe to the abode of their gods, and some sects of Al-Islâm assert is the dwelling-place of the mighty dead, but none has discovered it. It is Allah’s will that mortal eyes shall never rest upon it, therefore bad fortune and violent death overtake those who defy the divine wrath and attempt to penetrate the mystery.”