The journey across the desert was exceedingly fatal to the blacks, since they were not accustomed to the northern climate. They suffered from hunger, thirst and cold, and a large per cent. of them perished along the way. Damberger, who traveled through the interior of Africa between 1781 and 1797, relates, as follows, his experience as a slave-captive in crossing the desert. Passing through the Sudan he fell in with some Moors, journeying to Tegorarin, where he was sold to a slave dealer, who resold him to a Mussulman en route to Mezzabath, a town on the river Oniwoh. Here again he was sold to a merchant who carried him to Marocco. He narrates that "On the 6th of September, my new master and I departed with the caravan. It consisted of merchants from various nations, of persons of distinction, who had been performing a pilgrimage to Mecca, and of slaves. We proceeded slowly on our journey, as the roads were bad and our beasts were very heavily laden. Every day some of our company left the caravan, as we approached or passed the respective destinations. We traveled over mountains where the path was sometimes so narrow as only to permit the passage of one person at a time. We were constantly on the watch in these parts to prevent being surprised by the Arabs, as our caravan conveyed many valuable articles, which would have afforded rich plunder to those robbers. That which we apprehended actually happened on the seventh day after our departure, namely, on the 13th of Sept. A number of armed Arabs attacked us between the Cozul mountains and the river Tegtat; killed four of our slaves and three camels; and, though they lost several men in the attack, obstinately continued the combat. We defended ourselves to the utmost of our power, and at length had the good fortune to repel the whole troop. The victory, however, was not obtained till two of our merchants and five slaves were wounded, besides the four that were killed. We preserved all our property and the burthens of the slain camels were distributed among those that remained."[7]

An account of the caravan traffic from Timbuktu is given by Jackson, who says that Timbuktu "has from time immemorial carried on a very extensive and lucrative trade with the various maritime states of North Africa, viz., Marocco, Tunis, Algiers, Tripoli, Egypt, etc., by means of accumulated caravans, which cross the great desert of Sahara, generally between the months of September and April inclusive; these caravans consist of several hundred loaded camels, accompanied by the Arabs who let them to the merchants for the transportation of their merchandise to Fez, Marocco, etc., and at a very low rate. During their routes they were often exposed to the attacks of the roving Arabs of Sahara who generally commit their depredations as they approach the confines of the desert."[8] The wind sometimes rolls up the sand like great billows of the ocean, and caravans are often buried under the pile, and then the wind, shifting, scatters in the air those newly constructed mounds, and forms, amidst the chaos, dreadful gulfs and yawning abysses: the traveler, continually deceived by the aspect of the place, can discover his situation only by the position of the stars.

When the caravans reach Akka, on the northern border of the desert, the camels and the guides are discharged, and others hired to proceed to Fez, Marocco, etc. The trip across the desert is made in about 130 days, including the necessary stops. Caravans go at the rate of three and one half miles an hour, and travel seven hours a day. The convoys of the caravan usually consist of two or more Arabs belonging to the tribe through whose territory the caravan passes. When the convoys reach the limit of their country, they transfer the caravan to other guides, and so on till the desert is crossed. The individuals who compose the caravans are accustomed to few comforts. "Their food, dress and accommodation are simple and natural: proscribed from the use of wine and intoxicating liquors by their religion, and exhorted by its principles to temperance, they were commonly satisfied with a few nourishing dates and a draft of water; and they will travel for weeks successively without any other food."[9]

The caravans from Timbuktu were wont to export to the Barbary States gold dust and gold rings, ivory, spices, and a great number of slaves. "A young girl of Haussa, of exquisite beauty," remarks Jackson, "was once sold at Marocco, whilst I was there, for four hundred ducats, whilst the average price of slaves is about one hundred."[10] As to the cost of transporting the slaves, Jackson states that "Ten dollars expended in rice in Wangara is sufficient for a year's consumption for one person; the wearing apparel is alike economical; a pair of drawers, and sometimes a vest, forming all the clothing necessary in traversing the desert."[11]

Gen. Daumas describes a journey he made from Katsena in the Sudan across the desert about the middle of the nineteenth century. Arriving at Katsena, he says that his caravan was met by a great and mixed crowd of Negroes, who crowded around the camels, speaking in the most animated manner their unknown language. He and his companions were assigned to a special quarter of the city, and provided with lodgings. The camels were put in charge of some poor men of the caravan who led them away every day to the pasture, brought them back at four or five o'clock in the evening, and placed them in the enclosure in the city. The caravan leaders paid their respects to the chief of the city who bade them welcome and promised them protection. The business proceeded leisurely, as it was customary for the caravans to remain there two months.

The chief, not having a sufficient supply of slaves on hand to trade, caused his big drums to be beaten, and organized two bands of troops to execute a raid among the heathen tribes to the east and southwest. The raiding bands attacked only tribes with whom they were at war, or who refused to adopt the Mohammedan religion. While the troops were on the warpath, the caravan leaders visited the city slave market and made, from day to day, a few purchases. The price paid for an old Negro was 10,000 to 15,000 cowries, an adult Negro 30,000, a young Negro woman 50,000 to 60,000, a Negro boy or girl 35,000 to 45,000. The seller agreed to take back, within three days of the date of the purchase, any slaves that proved to have objectionable qualities, such as a disease, bad eyes or teeth, or a habit of snoring in sleep. As a rule slaves that come below Nupé were not salable for the reason that, being unaccustomed to eat salt, it was difficult for them to withstand the regime of the desert. Also, slaves from certain countries south of Kano were not salable because they were cannibals. The slaves from this region were recognized by their teeth which were sharpened to a point, resembling those of a dog. Negroes from other tribes were not purchased because they were believed to have the power of causing a man to die of consumption by merely looking at him. The purchase of Fellatahs, or pregnant Negro women, or Jews was strictly forbidden by the Sultan. The Fellatahs were not bought because they boasted of being white people. The Negro women could not be bought because the child to be born would be the property of the Sultan if its mother were a heathen, and it would be free if the mother were a Mohammedan. The Jew Negroes could not be bought because they were jewelers, tailors, artisans and indispensable negotiators.

The raiding troops, after having been on the campaign for nearly a month, returned with 2,000 captives, who marched in front of the column, the men, women, old and young, almost all nude, or half clad in ragged blue cloth, and the children piled upon the camels. The women were groaning, and the children crying, while the men, though seemingly more resigned, bore bloody marks upon their backs made by the whips. The convoy was marched to the palace, where its arrival was announced to the Sultan by a band of musicians. The Sultan complimented the chief, examined the slaves and ordered them to the slave market; and the next morning the caravan leaders were invited to come and make their purchases.

After the slave-trading was over, it was necessary to purchase supplies of corn, millet, dried meat, butter and flour for three months, also to purchase camels and hide-tents. Daumas's caravan, which set out from Metlily with only 64 camels and sixteen men, had now increased to 400 slaves and nearly 600 camels.

A caravan from Tuat, which had joined that of Daumas, had augmented in the same proportions. It had bought 1,500 slaves and its camels had increased to 2,000. These two caravans waited two days to be joined by three others which had penetrated farther to the south. It was desirable that all of the caravans recross the desert together in order better to resist attacks from the Tuaregs, Tibbus, and other highwaymen of that region.

The slaves had to be watched very closely, since believing that they were to be eaten by the white men, they were ready to take any chance of escaping. The women were tied in twos by the feet, and the men tied eight or ten together, each with his neck in an iron collar, to which was attached a short chain which held the hand of each slave at the height of his chest. At night Daumas fastened to his wrist the chains which bound all of his slaves together so that the least movement would wake him.