They then proceeded along the sea-coast until they came in sight of a high mountain overlooking the sea. In it were many caves, and, lo, in these was a people of the blacks, clad in hides, and with burnouses of hides upon their heads, whose language was not known. And when they saw the troops, they ran away from them, and fled, while their women and their children stood at the entrances of the caves. So the Emeer Moosa said: "O Sheikh Abd-Es-Samad, what are these people?" And he answered: "These are the objects of the inquiry of the Prince of the Faithful." They therefore alighted, and the tents were pitched, and the riches were put down; and they had not rested when the king of the blacks came down from the mountain, and drew near to the troops. He was acquainted with the Arabic language; wherefore, when he came to the Emeer Moosa, he saluted him; and the emeer returned his salutation, and treated him with honour. Then the king of the blacks said to the emeer: "Are ye of mankind, or of the genies?" The emeer answered: "As to us, we are of mankind; and as to you, there is no doubt but that ye are of the genies, because of your seclusion in this mountain that is separated from the world, and because of the greatness of your make." But the king of the blacks replied: "Nay, we are a people of the race of Adam, of the sons of Ham, the son of Noah, on whom be peace! And as to this sea, it is known by the name of El-Karkar." The Emeer Moosa then said to him: "We are the associates of the King of El-Islam, Abd-El-Melik the son of Marwan; and we have come on account of the bottles of brass that are here in your sea, and wherein are the devils imprisoned from the time of Solomon, the son of David. He hath commanded us to bring him some of them, that he may see them, and divert himself by the view of them." And the king of the blacks replied: "Most willingly." Then he feasted him with fish, and ordered the divers to bring up from the sea some of the bottles of Solomon; and they brought up for them twelve bottles; wherewith the Emeer Moosa was delighted, and the Sheikh Abd-Es-Samad also, and the soldiers, on account of the accomplishment of the affair of the Prince of the Faithful. The Emeer Moosa thereupon presented to the king of the blacks many presents, and gave him large gifts. In like manner, too, the king of the blacks gave to the Emeer Moosa a present consisting of wonders of the sea.