The mule, ass, and goat enjoy the same immunity from the tsetse as man. Many large tribes on the Zambesi can keep no domestic animals except the goat in consequence of the scourge existing in their country. Human beings are frequently bitten yet suffer no harm, and zebras, buffaloes, pigs, pallahs, and other antelopes feed quietly in the very habitat of the fly. There is not so much difference in the natures of the horse and zebra, the buffalo and ox, the sheep and antelope, as to afford any satisfactory explanation of the phenomenon. Is not man as much a domestic animal as a dog? The disgust which the tsetse shows for animal excreta is turned to account by some of the doctors. They mix droppings of animals, human milk, and some medicines together, and smear the animals that are about to pass through an infested district. This though a preventive at the time is not a permanent protection. Inoculation does not insure immunity, as animals which have been slightly bitten in one year may perish by a greater number of bites in the next. It is probable that with an increase of guns the game will perish as has happened in the south, and tsetse deprived of food may become extinct simultaneously with the larger animals. The ravages it commits are sometimes enormous. Sebituane once lost nearly the entire cattle of his tribe, amounting to many hundreds, by unwittingly intruding upon the haunts of this murderous insect. Every day, and all day long, has the traveller to contend with the ignorance and obstinacy and superstitions of the heathen he finds himself among--oftentimes alone--on whom he is dependent not only for the success of his enterprise, but, alas! for his very life. They will work when and as easily as they choose, and should they rebel against his just remonstrance and desert, he is a doomed man. Even when the explorer has plenty of money and companions and influence, his journeyings are not invariably through paths of roses, as may be gathered from the following account of a day’s march in Eastern Africa, by Burton: