This is the southern well of the name of Máfaras, while the northern spot of the same name, where Mr. Vogel made his astronomical observation, is about nineteen miles further to the north. We did not pass the latter till early in the morning of the 26th, when, stretching over an open desert flat, a real mirror or “meraye,” the exhaustion of our animals became fully apparent, so that just in the very place where a small Tebu caravan, which had preceded us a few days, had left behind one of their camels, we also were obliged to abandon the camel upon whose strength we had hitherto placed our chief reliance. About eleven miles beyond the northern well Máfaras, we halted during the heat of the day in a spot entirely destitute of herbage, and made another stretch of fifteen miles in the afternoon, leaving the well- known mound of Fája, along which the road leads to Tibésti, at some distance on our right. In order to recruit the strength of the camels, we gave them a good supper of dates, ground nuts, and millet, so that each of the poor animals, according to his habits and national taste, could pick out what was most palatable to him. [Sidenote: June 27th.] A march of about thirteen miles brought us to the well “El Áhmar,” or “Máddema,” in an open desert country, bounded on the west by a large imposing mountain group, and distinguished by a great profusion of kháreb, or kaye, the whole ground being overgrown with “handal,” or colocynth, and strewed with bones. Here we passed an excessively hot day, the thermometer indicating 114° at two o’clock in the afternoon in the best shade I could find, and 105° at sunset, it remaining extremely hot the whole night, till after midnight, when a heavy gale arose. Nature here showed some animation, and beetles were in extraordinary numbers; we also beheld here a herd of gazelles, but no beast of prey.