On the 6th of July the caravan from Fezzan arrived, bringing despatches from Kukawa, sent out from England, authorising him to carry on the objects of the expedition on a more extensive scale, while means were placed at his disposal for doing so. It was hoped in England that he and his companion would be able to cross the unknown region of equatorial Africa and reach the south-east coast; but, as the state of his health made this impossible, he was glad to find that Lord Palmerston suggested he should endeavour to reach Timbuctoo. To this plan, therefore, he turned his attention. He, however, found it very difficult to leave the city. The sultan, after some time, gave him an audience; that is to say, the doctor saw him, but the great man did not allow himself to be seen. Earth presented his gifts, and received in return, at his request, a supply of the manufactures of the country, instead of a female slave and a white camel, which the sultan offered him. He heard that the sultan entertained the fear that he might poison or kill him by a charm, and that he had repeatedly consulted his learned men, or councillors, how he should protect himself against his witchcraft. After repeated delays, on the 10th of August he was allowed to take his departure. The sultan had set his eyes on his horse, and, just as he was starting, sent to ask him to sell it; but this he positively declined doing, and no attempt was made to seize the animal. He reached Kukawa after an interesting journey, without a mishap, on the 21st of August. He found Mr Overweg very sickly. Unhappily, he thought himself strong enough to go out shooting, and was so imprudent as to go into deep water after water-fowl, and remain all the day afterwards in his wet clothes. He was seized with a severe illness in consequence, but believed that he should get better if removed to the country home of their friend Fugo Ali. He here became much worse, and in two days died. A grave was dug for him near the borders of the lake in the exploration of which he had taken so much interest. Dejected at his lonely situation, and unwilling any longer to stay in a place which had become intolerable to him, Barth determined to set out as soon as possible on his journey towards the Niger. CHAPTER TWELVE. TRAVELS OF DR. BARTH CONCLUDED.