On the 4th February, 1823, the caravan reached Lari, a town on the northern boundary of Bornou, in lat. 14° 40' N. The inhabitants, astonished at the size of the "kafila," fled in terror at its approach.
"Beyond, however," says Denham, "was an object full of interest to us, and the sight of it produced a sensation so gratifying and inspiring, that it would be difficult for language to convey an idea of its force or pleasure. The great Lake Tchad, glowing with the golden rays of the sun in its strength, appeared to be within a mile of the spot on which we stood."
On leaving Lari, the appearance of the country changed completely. The sandy desert was succeeded by a clay soil, clothed with grass and dotted with acacias and other trees of various species, amongst which grazed herds of antelopes, whilst Guinea fowls and the turtle-doves of Barbary flew hither and thither above them. Towns took the place of villages, with huts of the shape of bells, thatched with durra straw.
The travellers continued their journey southwards, rounding Lake Tchad, which they had first touched at its most northerly point.
The districts bordering on this sheet of water were of a black, firm, but muddy soil. The waters rise to a considerable height in winter, and sink in proportion in the summer. The lake is of fresh water, rich in fish, and frequented by hippopotami and aquatic birds. Near its centre, on the south-east, are the islands inhabited by the Biddomahs, a race who live by pillaging the people of the mainland.
The explorers had sent a messenger to Sheikh El Khanemy, to ask permission to enter his capital, and an envoy speedily arrived to invite Boo-Khaloum and his companions to Kouka.
On their way thither, the travellers passed through Burwha, a fortified town which had thus far resisted the inroads of the Tuaricks, and crossed the Yeou, a large river, in some parts more than 500 feet in width, which, rising in the Soudan, flows into Lake Tchad.
On the southern shores of this river rises a little town of the same name, about half the size of Burwha.
The caravan soon reached the gates of Kouka, where, after a journey extending over two months and a half, they were received by a body of cavalry 4000 strong, under perfect discipline. Amongst these troops was a corps of blacks forming the body-guard of the sheikh, whose equipments resembled those of ancient chivalry.