The road lay through a swampy region, and the rains caused many of the holes to be filled with water, so that the travelling was none of the best. In many places it was not safe to remain on the horses, and a good part of the way was made on foot by the Doctor and his young companions. Doctor Bronson said that if this kind of road continued it would be necessary to walk altogether, or be carried on litters, after the custom of Africa. The horses began to show signs of fatigue, and indicated very plainly that the climate of Central Africa was not suited to their constitution. Their temper was not at all improved, though perhaps this was due quite as much to their treatment by their grooms as to the climate of the country. Frank said his horse never omitted an opportunity to kick at him, and it was preferable to approach the animal at the head rather than at the heels. The Doctor said it would be something never before accomplished to take a horse all the way across Africa, and if they succeeded in getting their steeds beyond the southern end of the Victoria N'yanza they would have done something to be proud of. They had many speculations as to the possibility of escaping the tsetse, which had already given them an alarm, though happily a false one. Fred proposed to envelop his horse in a garment of antelope-skin, or something equally impervious to the sting of the fly. The Doctor suggested that he would have a hard time to make the horse understand the use of this new covering, and if he was compelled to wear it constantly the health of the beast would be endangered almost as much as by the fly. On the whole, they concluded not to borrow too much trouble about the future, but to take as good care as possible of the animals that carried them and hope for the best. Both boys gave strict orders to their grooms and other servants to keep a sharp watch for the tsetse, and report the first indication of its presence. It was agreed that when there was reason to believe it was among them the native precautions should be adopted, and if any new measures could be devised they would be tried on the first occasion. [Illustration: APPROACHING CAMP.] CHAPTER XXII. THE MARCH THROUGH UGUNDA.--ARRIVAL AT KING M'TESA'S PALACE.