We sailed to-day in the morning at sunrise, but soon halted again on the right bank of the river, at the Arab tribe of Abdallah Ozerrs, where we took in wood. Another unnecessary delay! This might have been done yesterday. From the Abdallah Ozerrs we came to the Gulamabs and Hussein-Abs (Ab, abbreviation of Arab). At noon we reached, with a few deviations right and left from our course towards the south, the rocky hill of Auli, which rises to the height of some two hundred feet on the right shore, a day’s journey from Khartùm. From the numerous fragments found in the vicinity, being a conglomeration of chalk and limestone very much washed and brittle, this hill evidently belongs to the limestone formation. The name is derived probably from the Arabic _auel_; because this is the _first_ high ground met with on the White Stream. It is also called Gare-Nebih, from a Sheikh buried there, and from whom also, conformably to the Arabic custom, the tribes dwelling there have taken their names. Opposite to Gebel Auli, over the left side of the river, is seen another and more extensive elevation, bearing the name of Mandera. These rocky hills are of granite formation, and seem not to exceed a height of three hundred feet above the level of the stream. The word Mandera has here no more a Greek signification than Auli, although it still means, in Káhira, the lower part of the house, where the stables generally are to be found; in which, certainly, its analogy with sheepfold and a monastery is very close. But it here signifies a height upon which there is no water. On the left bank of the river are two tribes, which live in friendship and cultivate their durra fields in common. Higher up are the Gemulies, and beyond these the Mohammedies, belonging to the race of Gare Nebihs, whose Sheikh lies buried on the western plain, and who here possess both shores. The Gebel Mussa soon shewed itself on the left, two hours’ journey from Gebel Mandera, also a hill of rocks (hornstone formation), which has received its name from the holy Sheikh buried there. Therefore, here also prevails the tasteless custom which in Europe has displaced so many radical names of places in history, tradition, and popular custom. The old name of this mountain is Brame; in which at present I can see no meaning. Both of these tribes dwell on the right and left shores; where likewise are found venerated graves of the family of Sheikh Mussa, to whose progenitor Mount Mandera belongs. Their present Sheikh is called Mussa Wollet Makbull,—a sensible, brave man. Rapidity of the stream one sea-mile; depth four to five fathoms and a half. Yesterday, when we sounded the stream, there was little or no current, which in fact decreases with the depth. This morning, at sunrise, it was seventeen degrees Reaumur; at noon thirty; and in the evening, at sunset, still twenty-seven degrees in the shade, at the open window.