We reposed the rest of the day on this spot, distant from our last encampment four hours march, and our chief dispatched a messenger to Mourzouk, to give notice of arrival of the caravan on the frontier of the kingdom, and to bear a letter of respect to the sultan from each merchant individually. And now, on the _sixteenth_, (dating by our departure from _Augila_), we came again to the society of men: a march of nine hours bringing us to _Temissa_, situated within the territory of Fezzan. SECTION II. _Observations on the Region of the Harutsch._ The mountainous desert of _Harutsch_ is the most remarkable region that came within scope of my observation during this journey; its extent has been stated to me at seven days journey over, from north to south; and at five days from east to west: but in a subsequent voyage from Fezzan to Tripoly, I fell in again with a branch or tract of the _Harutsch_, and was there told, that it yet extended further to the _west_. At Mourzouk, too, I was informed of black mountains on the road leading southward to Bornou, on whose heights the climate was of very cold temperature, and whence the people of Mourzouk obtained their iron; and I conjecture that such mountainous tract may be a further branch of the _Harutsch_, though having indeed no positive information or proof of the immediate junction or connection of these regions. The rugged, broken, and altogether wild and terrific scene which this desert tract affords, leads strongly to the supposition that its surface at some period took its present convulsed form and appearance from volcanic revolution. Its inequalities of ground are no where of great altitude. The general face of country shews continued ranges of hills, running in various directions, rising from eight to twelve feet only above the level of the intermediate ground; and between which branches, (on perfect flats, and without any gradual ascent of base or fore-ground,) rise up lofty insulated mountains, whose sides are exceeding steep from the very base. A mountain of this description, situated midway on journey over this desert, and north of our caravan road, is by the Arabs termed _Stres_; it has the appearance of being split from the top down to the middle. I was prevented from particular examination of it, but soon, on our caravan halting, had the opportunity of inspecting another of the same kind.