The ordinary porters received the equivalent of ten dollars each in cloth at Zanzibar prices, and were to be paid off at Bagamoya, the port from which the traders cross to Zanzibar. The ivory-porters received two dollars extra, in consideration of the peculiar shape of their burdens and the difficulty of handling them. The largest tusks were slung between two men, as they were too heavy for a single porter; and these double porters have a traditional right of refusing to march more than ten miles a day. In addition to their wages the porters are to be fed on the road, and the master of the caravan must be prepared to purchase the necessary provisions. For this purpose he carries a supply of cloth and beads, and a great deal of bargaining is required in making purchases. Where the country is peaceable a trusty man is sent ahead of the caravan to make arrangements; but if the natives are hostile this cannot be done, as the messenger would be liable to be waylaid and killed. The road between Unyamyembe and Zanzibar is now so well known, and so frequently travelled, that the route is divided into marches, and the natives derive quite an income from supplying the wants of the caravans. The expense of feeding a caravan is set down at about five dollars for each porter, and perhaps twice as much for the _askari_, or Arab soldiers, who are almost invariably taken along as an escort. Goats and bullocks supply the meat for feeding the porters, and the vegetable part of their bill of fare includes sweet-potatoes, manioc, rice, bananas, meal from wheat and corn, and anything else that the region through which they pass happens to offer. Occasionally fish are caught from the rivers, and game is shot in the forest, but they cannot be relied upon as a regular supply. [Illustration: A HOUSE IN UNYAMYEMBE.] And now what do you suppose happened to Frank and Fred? Without having intended doing so beforehand, they became ivory-merchants. It happened in this way: They found, on making an inventory of their goods, that they had considerably more than was needed for paying the expenses of their journey to the coast. Of course they desired to sell the surplus, and found the Arab merchants ready to buy. Money was not available, and they were obliged to take the currency of the country, which was ivory. The party became the owner of thirty tusks of ivory, and the property was consigned to the special care of Frank. The young man took especial pride in looking after this valuable series of burdens, and announced his determination to keep it constantly under his eye during the long journey. Abdul damped his ardor a little by telling him that the etiquette of African travel would forbid his doing so, and advising the employment of a trusty man to accompany the porters, and see that the ivory was properly piled at Frank's tent-door at night. [Illustration: UNYAMWEZI HEADS.]