Twenty camels make a respectable procession, and the boys were in high glee when they saw their beasts of burden drawn up in line, ready for departure. Fourteen of the baggage camels were sent away one evening, and our friends started early the following morning with the rest of the train. This included their saddle camels and the two animals that carried the things they would need on the journey from day to day. A glance at the map of Nubia will show a great bend in the Nile between Korosko and Aboo Hamed. Boats ascending the river and following this bend often consume three or four weeks, while the ride over the Desert can be made in from six to nine days. There are three cataracts in this part of the river. They are impassable except during the rise of the Nile, and even then their ascent is a tedious and expensive affair. Consequently the principal route of travel and commerce is through the Desert. There was no trouble in keeping the road, as it is well known to the guides and camel-drivers, and is annually traversed by great numbers of people. The dragoman, Abdul, had been over the route repeatedly, sometimes with small parties, and on two occasions with expeditions that the Egyptian Government had sent to the Upper Nile and the lake regions of Central Africa. Frank and Fred were greatly interested in the details of these expeditions, and listened eagerly to Abdul's account of them and the difficulties of transporting heavy articles over the Desert sands. [Illustration: THE NATIVE AT HOME.] At their first halt on the journey from Korosko, Abdul told them of his experience with the expedition of Sir Samuel Baker, for the suppression of the slave-trade in the Soudan country, some years ago, which was about as follows: "In 1869-70 Sir Samuel Baker was sent by Ismail Pacha, Khedive of Egypt, to suppress the slave-trade in the regions where we are now going. In order that he should do so effectively he was provided with a small army, and a suitable equipment of steamers for navigating the river, together with a large stock of goods for opening legitimate trade. Most of the slave-traders were Arab subjects of the Khedive, and their centre of business was at Khartoum." Fred asked how many men were engaged in the business. "As to that," said Abdul, "it is not easy to say. The merchants of Khartoum had organized a sort of military force for capturing the negroes and bringing them to market, and one of them was reported to have twenty-five hundred men in his pay. They were armed and drilled like soldiers, though not very thoroughly disciplined, and were divided into companies sufficiently strong to overpower any African village, and make prisoners of such of the inhabitants as they wished to carry to market. Altogether, it was thought that fifteen thousand subjects of the Khedive had left their honest occupations and were engaged, directly or indirectly, in the slave-trade."