At the village of Maduwari, he made the acquaintance of a chief, Fugo Ali, who treated him with great kindness and continued his friend ever afterwards. It was at his house, a year and a half later, poor Dr Overweg was destined to expire. Accompanying Fugo Ali, he made a long excursion in the neighbourhood of the lake, which is difficult to be reached, as it is surrounded by forests of reeds and broad creeks. He, however, got to one of these, a fine, open sheet of water, now agitated by a light east wind, which sent the waves rippling on the shore. The surface was covered with water-plants, and numberless flocks of fowl of every description played about. To reach it he had to pass through very deep water which covered his saddle, though he was mounted on a tall horse; and one of his companions on a little pony was swamped altogether, his head and his gun alone being visible from time to time. The inhabitants on the shores of the lake subsist chiefly on fish, which they catch in an ingenious way. The fisherman takes two large gourds, which he connects by a bamboo of sufficient length to allow him to sit astraddle between them. He then launches forth on the water, taking his nets. These are weighted by little leathern bags, filled with sand and supported by bits of bamboo. Having shot his net, he paddles about with his hands, driving the fish into it, and then, taking them out, kills them with a club, and throws them into the gourds. When they are full, he returns to the shore. Returning to Kukawa, Dr Barth found encamped outside the town a large slave caravan. There were seven hundred and fifty slaves in the possession of the merchants who went with it. Slaves were at that time the principal export from Bornou. Soon after this Dr Overweg arrived, looking greatly fatigued and much worse than when the doctor parted from him four months before. On the 29th of May, 1851, Dr Barth and Dr Overweg set out on a journey to Adamawa, in the south. As they advanced their camels were objects of great curiosity and wonder to the natives, that animal seldom getting thus far south, as it will not bear the climate for any length of time. The country was generally level, with high conical mountains, separated from each other, rising out of it. Though at first swampy, it became woody and well-watered, in many parts densely inhabited, with numerous villages, where even the Mahommedans have penetrated.