The society had, at the time they engaged Ledyard, entered into terms with Mr. Lucas, a gentleman, who, being captured in his youth by a Sallee rover, had been three years a slave at the court of Morocco, and after his deliverance acted as vice-consul in that empire. Having spent sixteen years there, he had acquired an intimate knowledge of Africa and its languages. He was sent by way of Tripoli, with instructions to accompany the caravan, which takes the most direct route into the interior. Being provided with letters from the Tripolitan ambassador, he obtained the Bey's permission, and even promises of assistance for this expedition. At the same time he made an arrangement with two sheerefs or descendants of the Prophet, whose persons are held sacred, to join a caravan with which they intended to travel. He proceeded with them to Mesuraba, but the Arabs there being in a state of rebellion, refused to furnish camels and guides, which, indeed, could scarcely be expected, as the Bey had declined to grant them a safe conduct through his territories. Mr. Lucas was therefore obliged to return to Tripoli, without being able to penetrate further into the continent. He learned, however, from Imhammed, one of the sheerefs, who had been an extensive traveller, a variety of particulars respecting the interior regions. The society had, at the same time, made very particular inquiries of Ben Ali, a Morocco caravan trader, who happened to be in London. From these two sources, Mr. Beaufoy was enabled to draw up a view of Centra. Africa, very imperfect, indeed, yet superior to any that had ever before appeared. According to the information thus obtained, Bornou and Kashna were the most powerful states in that part of the continent, and formed even empires, holding sway over a number of tributary kingdoms, a statement which proved at that time to be correct, though affairs have since greatly changed. The Kashna caravan often crossed the Niger, and went onwards to great kingdoms behind the Gold Coast, Gongah or Kong, Asiente or Ashantee, Yarba or Yarriba, through which Clapperton afterwards travelled. Several extensive routes across the desert were also delineated. In regard to the Niger, the report of Imhammed revived the error, which represented that river as flowing westward towards the Atlantic. The reason on which this opinion was founded, will be evident, when we observe that it was in Kashna, that Ben Ali considered himself as having crossed that river. His Niger, therefore, was the Quarrama, or river of Zermie, which flows westward through Kashna and Sackatoo, and is only a tributary to the Quorra or great river, which we call the Niger. He describes the stream as very broad and rapid, probably from having seen it during the rainy season, when all the tropical rivers of any magnitude assume an imposing appearance.