On the arrival of the travellers at Bilma, the sultan, escorted by a number of men and women, came out to meet the strangers. The women were much better-looking than those in the smaller towns; some of them had indeed very pleasant faces, their white, regular teeth contrasting admirably with their shining black skins, and the three "triangular flaps of hair, streaming with oil." Coral ornaments in their noses, and large amber necklaces round their throats, gave them what Denham calls a "seductive appearance." Some of them carried fans made of grass or hair, with which to keep off the flies; others were provided with branches of trees; all, in fact, carried something in their hands, which they waved above their heads. Their costume consisted of a loose piece of Soudan cloth, fastened on the left shoulder, and leaving the right uncovered, with a smaller piece wound about the head, and falling on the shoulders or flung back. In spite of this paucity of clothing, there was not the least immodesty in their bearing. A mile from Bilma, and beyond a limpid spring, which appears to have been placed there by nature to afford a supply of water to travellers, lies a desert, which it takes no less than ten days to cross. This was probably once a huge salt lake. On the 4th February, 1823, the caravan reached Lari, a town on the northern boundary of Bornou, in lat. 14 degrees 40 minutes 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.