We have seen that there was an ancient tradition reported by Herodotus, that the Nile trended off to the west and became there the river Niger; while still earlier there was an impression that part of it at any rate wandered eastward, and some way joined on to the same source as the Tigris and Euphrates--at least that seems to be the suggestion in the biblical account of Paradise. Whatever the reason, the greatest uncertainty existed as to the actual course of the river, and to discover the source of the Nile was for many centuries the standing expression for performing the impossible. In 1768, James Bruce, a Scottish gentleman of position, set out with the determination of solving this mystery--a determination which he had made in early youth, and carried out with characteristic pertinacity. He had acquired a certain amount of knowledge of Arabic and acquaintance with African customs as Consul at Algiers. He went up the Nile as far as Farsunt, and then crossed the desert to the Red Sea, went over to Jedda, from which he took ship for Massowah, and began his search for the sources of the Nile in Abyssinia. He visited the ruins of Axum, the former capital, and in the neighbourhood of that place saw the incident with which his travels have always been associated, in which a couple of rump-steaks were extracted from a cow while alive, the wound sewn up, and the animal driven on farther. Here, guided by some Gallas, he worked his way up the Blue Nile to the three fountains, which he declared to be the true sources of the Nile, and identified with the three mysterious lakes in the old maps. From there he worked his way down the Nile, reaching Cairo in 1773. Of course what he had discovered was merely the source of the Blue Nile, and even this had been previously visited by a Portuguese traveller named Payz. But the interesting adventures which he experienced, and the interesting style in which he told them, aroused universal attention, which was perhaps increased by the fact that his journey was undertaken purely from love of adventure and discovery. The year 1768 is distinguished by the two journeys of James Cook and James Bruce, both of them expressly for purposes of geographical discovery, and thus inaugurating the era of what may be called scientific exploration. Ten years later an association was formed named the African Association, expressly intended to explore the unknown parts of Africa, and the first geographical society called into existence. In 1795 MUNGO PARK was despatched by the Association to the west coast. He started from the Gambia, and after many adventures, in which he was captured by the Moors, arrived at the banks of the Niger, which he traced along its middle course, but failed to reach as far as Timbuctoo. He made a second attempt in 1805, hoping by sailing down the Niger to prove its identity with the river known at its mouth as the Congo; but he was forced to return, and died at Boussa, without