This was the regular negro system which had originally introduced the slave trade throughout the White Nile. One tribe invariably requests the alliance of a superior force to attack some powerful neighbour: the prisoners of war become slaves. When trading adventurers first commenced on the White Nile, the natives sold ivory for beads and copper bracelets; and trade was fairly established. The armed companies of the traders were immediately invited to become allies, and attacks were made upon various tribes. The cattle and slaves became the property of the captors. The traders quickly discovered that it was far easier and more profitable to steal cattle and slaves to exchange for ivory, than to import goods from Khartoum. They commenced the system of cattle-lifting and slave-hunting, which rapidly increased until it arrived at the immense scale already described. I preached morality hopelessly to the Baris; they were mere ruffians, and they longed for the arrival of Abou Saood, who would once more give them an opportunity of joining his people to plunder and enslave the tribes of the interior. It was in vain that I assured them of the impossibility of such proceedings, and that Abou Saood's people would not be permitted by the government to continue these atrocities. They ridiculed the idea, and declared that the traders would always continue in their old customs, notwithstanding the presence of the Khedive's officers. They said that no business could be done in any other way in those countries; they advised me to "take women and cattle, and then the natives would listen to my advice, but not otherwise." It was utter folly to attempt negotiations with these people; they were the most brutal and obtuse savages. They had been abandoned by the missionaries as hopeless, and they would acknowledge nothing but force. The troops were discontented. After all their fatigues, the promised land was starvation. There was still much work to be done, as the expedition was in fact only commencing. By degrees the Baris absented themselves entirely from our camp, and we were left to ourselves as utter strangers. The cattle were driven over to our fine pasturage daily, and returned at night to their island; but not an ox, or even a goat, was ever offered for sale, and all communication between us and the natives had apparently ceased. It was quite impossible to allow this to continue. I gave the order, and once more the soldiers quietly surrounded the herd of cattle, and drove them to head-quarters as before. The old scene was re-enacted. The new sheik, Morbe, together with Allorron and many headmen, arrived. Again a long palaver took place, through the medium of Tomby, the interpreter, and the promises of good behaviour were renewed.