Many days had passed by, during which the usual incidents of African travel had occurred; but I need not stop to describe them, except to say that Mr Fraser had been successful in killing several elephants, which he did for the sake of their tusks, and also in purchasing a large quantity of ivory from the natives who visited our camp to trade, or inhabited the villages near which we passed. Thus he had no reason to complain of the long journey he had made to rescue us, although we were not the less inclined to be grateful to him. The country ravaged by the locusts had been passed at last, but not till our cattle were almost starved, and we and they had suffered greatly from want of water. The dried and pounded locusts had assisted to support our people, but we were now greatly in want of provisions. Stanley had borne the journey remarkably well, and was rapidly recovering from the hurts inflicted upon him by the lion; while Leo and Natty were completely themselves again. Stanley was very anxious once more to mount his horse and to assist in hunting, in order to supply the camp with food; but of this David would not hear, and declared that it would be equivalent to fratricide if he allowed it. Donald, Timbo, and I, and sometimes Senhor Silva, therefore scoured the country in every direction in search of game. Donald and I were riding on ahead one day, when he observed on a bush a fly somewhat smaller than the common blue-bottle fly--so annoying to the butcher--but with rather longer wings. Begging me to hold his horse, he jumped off and caught it. Instantly leaping into his saddle, he told me to turn and ride for my life, with an expression of consternation in his countenance which made me fancy that he had suddenly gone out of his mind. However, as we rode on he explained that the fly which he held in his fingers was the tsetse fly (David called it the _Glossina morsitans_), and that it was more dangerous to cattle and horses than all the lions and snakes in the country. Fortunately our horses had not been bitten by it. He told me that had such been the case their death would have been certain. It attacks, however, only domesticated animals, for wild beasts range over the country infested by it with impunity; while human beings are scarcely more annoyed by it than they are by flea-bites. It is confined to certain localities, and is never known to shift its haunts. He told me that it was found generally in the bush or among reeds. Though the insect is small, yet the poison it contains is of so virulent a nature that its bite is as deadly to horses and oxen as that of the most venomous serpent. Donald said he had ample reason to be afraid of it, for on one occasion, not believing in its power to injure him, he had attempted to pass through a district infested by it, when he lost all his oxen and horses, and very nearly his own life and that of his companions. They were in a wild and uninhabited district, and were