Slavery exists on an immense scale in this province, many private individuals having more than a thousand slaves. The governor, Mohamet Lowel, is said to receive five thousand every year in tribute, besides horses and cattle.

This is one of the finest districts in Central Africa, irrigated as it is by numerous rivers besides the Binue and Faro, and being diversified with hill and dale. Elephants were exceedingly plentiful, both black and grey and yellow, and the rhinoceros is also met with in the river. Barth was told that there lives in the river an animal resembling the seal, which comes out at night and feeds on the fresh grass.

His adventurous journey obtained the doctor so much fame at Kukawa that, on his return, a party of horsemen galloped out to salute him, and led him in procession to his house. Mr Overweg, who had in the meantime been exploring Lake Chad in a boat, now rejoined him. His next excursion was to Kanem, on the east of Lake Chad, for which he set out on the 11th of September by the way of its northern shores. He had received a valuable horse from the vizier, which was his companion for the next three years. He was attended by two Arabs and a couple of Fezzan lads he had taken into his service. He soon felt revived by the fresh air of the country. The region through which he passed was usually rich, partly forest and partly cultivated.

On the 18th he was joined by Mr Overweg, who arrived accompanied by a band of horsemen. The horsemen treated the natives with the utmost cruelty, stealing their property wherever they went. One day, meeting some cattle-breeders, they plundered them of their milk and of the very vessels which contained it. On applying to Dr Barth for redress, he was enabled not only to restore to them their vessels, but to make them a few small presents.

Descending from the high ground, they continued their course between the sand-hills and a blue inlet of the lake to the south. Some way to the right they caught sight of a whole herd of elephants, ranged in regular array like an army of rational beings, slowly proceeding to the water.

It had been supposed that Lake Chad is salt. This is not the case. The natron or soda, which is procured in the neighbourhood, is found alone in the ground. When an inundation reaches a basin filled with soda, the water of course becomes impregnated. The soda, indeed, has very little effect so long as the basin is deep, and does not begin to make itself felt till the water becomes shallow.

Shortly afterwards, passing a grove of mimosa, two of the horsemen who had been in front came galloping back with loud cries. On approaching the spot they saw a large snake hanging in a threatening attitude from the branches of a tree. On seeing the strangers it tried to hide itself, but after several balls had struck it, it fell down, and its head was cut off. It measured eighteen feet seven inches in length, and five inches in diameter.

They now joined themselves to a party of Arabs, by whom they hoped to be protected on their journey. The expedition was not without danger. One night they were aroused by a terrible screaming and crying from the women, and shouts of “Mount! mount!” Another band of freebooters had attacked the camels, and, having put to flight two or three men and killed a horseman, had driven off part of the herd. The robbers were pursued and overtaken, when they gave up their booty. The lamentations of the females for a man who had been slain sounded woefully through the remainder of the night.

Two days afterwards the Arabs were in great commotion, in consequence of the most handsome among the female slaves, who composed part of the spoil that was to be taken to the vizier, having made her escape during the night. They were eagerly searching for her from dawn of day, but could not find her. At length they discovered her necklace and clothes, and the remains of her bones—evident proofs that she had fallen a prey to the wild beasts.

As they advanced eastward the situation of the Arab robbers became daily more dangerous; nothing was thought of but to retrace their steps westward.