The elephantiasis, so common in Abyssinia, is not known here. The small-pox is a disease not endemial in the country of Sennaar. It is sometimes twelve or fifteen years without its being known, notwithstanding the constant intercourse they have with, and merchandizes they bring from Arabia. It is likewise said this disease never broke out in Sennaar, unless in the rainy season. However, when it comes, it sweeps away a vast proportion of those that are infected: The women, both blacks and Arabs, those of the former that live in plains, like the Shillook, or inhabitants of El-aice, those of the Nuba and Guba, that live in mountains, all the various species of slaves that come from Dyre and Tegla, from time immemorial have known a species of inoculation which they call Tishteree el Jidderee, or, _the buying of the small pox_. The women are the conductors of this operation in the fairest and driest season of the year, but never at other times. Upon the first hearing of the small pox any where, these people go to the infected place, and, wrapping a fillet of cotton cloth about the arm of the person infected, they let it remain there till they bargain with the mother how many she is to sell them. It is necessary that the terms be discussed judaically, and that the bargain be not made collusively or gratuitously, but that one piece of silver, or more, be paid for the number. This being concluded, they go home, and tie the fillet about their own child's arm; certain, as they say, from long experience, that the child infected is to do well, and not to have one more than the number of pustules that were agreed and paid for. There is no example, as far as I could learn, either here or in Abyssinia, of this disease returning, that is, attacking any one person more than once.