The doctor took his bearings, by means of lunar observations, and consulted the excellent map that he had with him for his guidance. It belonged to the Atlas of “Der Neuester Endeckungen in Afrika” (“The Latest Discoveries in Africa”), published at Gotha by his learned friend Dr. Petermann, and by that _savant_ sent to him. This Atlas was to serve the doctor on his whole journey; for it contained the itinerary of Burton and Speke to the great lakes; the Soudan, according to Dr. Barth; the Lower Senegal, according to Guillaume Lejean; and the Delta of the Niger, by Dr. Blaikie. Ferguson had also provided himself with a work which combined in one compilation all the notions already acquired concerning the Nile. It was entitled “The Sources of the Nile; being a General Survey of the Basin of that River and of its Head-Stream, with the History of the Nilotic Discovery, by Charles Beke, D.D.” He also had the excellent charts published in the “Bulletins of the Geographical Society of London;” and not a single point of the countries already discovered could, therefore, escape his notice. Upon tracing on his maps, he found that his latitudinal route had been two degrees, or one hundred and twenty miles, to the westward. Kennedy remarked that the route tended toward the south; but this direction was satisfactory to the doctor, who desired to reconnoitre the tracks of his predecessors as much as possible. It was agreed that the night should be divided into three watches, so that each of the party should take his turn in watching over the safety of the rest. The doctor took the watch commencing at nine o’clock; Kennedy, the one commencing at midnight; and Joe, the three o’clock morning watch. So Kennedy and Joe, well wrapped in their blankets, stretched themselves at full length under the awning, and slept quietly; while Dr. Ferguson kept on the lookout. CHAPTER THIRTEENTH. Change of Weather.—Kennedy has the Fever.—The Doctor’s Medicine.—Travels on Land.—The Basin of Imenge.—Mount Rubeho.—Six Thousand Feet Elevation.—A Halt in the Daytime. The night was calm. However, on Saturday morning, Kennedy, as he awoke, complained of lassitude and feverish chills. The weather was changing. The sky, covered with clouds, seemed to be laying in supplies for a fresh deluge. A gloomy region is that Zungomoro country, where it rains continually, excepting, perhaps, for a couple of weeks in the month of January. A violent shower was not long in drenching our travellers. Below them, the roads, intersected by “nullahs,” a sort of instantaneous torrent, were soon rendered impracticable, entangled as they were, besides, with thorny thickets and gigantic lianas, or creeping vines. The sulphuretted hydrogen emanations, which Captain Burton mentions, could be distinctly smelt. “According to his statement, and I think he’s right,” said the doctor, “one could readily believe that there is a corpse hidden behind every thicket.”