"Yes; he came to the island of Aba, which lies about latitude 12° north, or two hundred and fifty miles from Khartoum. He was very anxious to push on to the south, but his contract with the owner of the boat was only for a journey to this island. At that time the highest point on the Nile to which any Europeans had ascended was about latitude 4° north, or four hundred and eighty miles beyond the island of Aba. Nothing was known about the sources of the Nile, and the general impression among geographers was that the river rose at the base of Mount Kilimandjaro, in the third degree of south latitude. Some geographers had thought it possible that the Nile flowed from Lake N'yassi, but the idea was generally rejected. 'Since Columbus first looked upon San Salvador,' wrote Mr. Taylor in his journal, 'the earth has but one emotion of triumph left in her bestowal, and that she reserves for him who shall first drink from the fountains of the White Nile, under the snow-fields of Kilimandjaro.'"
"What great progress has been made since Mr. Taylor's time in the exploration of Africa!" Frank exclaimed, as the Doctor finished his last remark.
"Yes," was the reply, "the progress in the last half of the nineteenth century has been greater than in the preceding twenty centuries. From the days of Herodotus—two thousand years ago—till within the present generation exploration of the valley of the Nile had accomplished very little. Syene, at the first Cataract of the Nile, was a city in the days of the ancient dynasties of Egypt; three thousand years ago the kingdoms of Ethiopia flourished, and their rulers had a prominent place in history. Time and time again men sought in vain to solve the mystery of the source of the Nile, and it was reserved for men of our day to make the great discovery."
One of the boys asked to whom the honor belonged of ascertaining the source of the Nile.
"That question is a conundrum," replied the Doctor, with a smile, "and a conundrum that needs an explanation before answering. The honor belongs to several explorers, and not to one alone. Each has made discoveries peculiarly his own, and these discoveries have supplemented the work of the rest.
"As I have before told you, it was long supposed that the Blue Nile was the parent stream, and its sources were ascertained by James Bruce. The error of this belief was set forth after the death of Bruce, as the White Nile was found to be of greater volume than the Blue, and was explored to a point more distant from the junction of the two streams than were the springs of the Blue Nile. Mohammed Ali sent three expeditions to find the sources of the White Nile, but they failed in their efforts. Private expeditions were sent every few years, but with the same results. The heat, the fevers, the hostility of the natives, the difficulty of penetrating marshes and tropical forests, all conspired to frustrate their efforts. The first expedition of Mohammed Ali reached latitude 6° 30' north; the second went to 4° 42' north; and the third stopped at about 5° north. Dr. Knoblecher, in 1849, went to 4° 10' north, which was farther than any one else had gone. Miani, an Italian traveller, went to a point about 3° 32' north, and about the same time Dr. Schweinfurth explored the Bahr-el-Gazal, one of the tributaries of the White Nile, in the expectation that it might turn out to be the main stream. Miss Tinné, a Dutch lady, also explored that river, and spent more than a year in its valley."
"What!" exclaimed one of the youths, "a lady going on an expedition in Africa! She must have been fond of adventure. Who was she?"
"Miss Tinné was born in 1835, and was the daughter of a baroness, who had a large fortune. She was fond of travel, and in 1861 went to Cairo with her mother. She was so enamored of the East that she determined to remain there, and announced to her friends that she should not return to Europe to live. In 1862 she started from Khartoum with a steamboat, several sailing-boats, a large party of attendants, and so many beasts of burden of various kinds that the natives everywhere believed she was the daughter of the Sultan of Turkey. The only Europeans of her party were Dr. Steudner and Baron Von Henglin, and also her mother. The latter died of fever, and so did Dr. Steudner, before the return to Khartoum, which occupied some fourteen months after the departure of the expedition.
"Miss Tinné on this journey explored the Bahr-el-Gazal, and made a great many notes and observations, which have been very useful to those who followed her. She had previously visited the White Nile as far as Gondokoro, and altogether she passed nearly three years in the work of exploration. In 1869 she organized an expedition at Tripoli, intending to pass through Moorzook and Bornoo, and reach the Nile by way of Kordofan, a route which up to that time had never been followed by a European. She had fifty attendants and seventy camels on this expedition, and her only European companions were two Dutch sailors. From Moorzook she went on a side-journey to the country of the Touaregs, and was treacherously murdered by her escort. The sailors who accompanied her were also murdered, and her native attendants were sold into slavery.
"Let us return to the exploration of the White Nile," said Doctor Bronson. "While these discoverers were at work from the north others were approaching the Nile from the south, and it was from that direction the great secret was revealed. In 1856 Captains Speke and Burton, of the British army, started from Zanzibar for a journey into Africa, and on the 30th of July, 1858, Captain Speke discovered the Victoria N'yanza.