Ascending by the dry bed of a torrent on the south side of the river, we skirted the eastern end of Jibel Teluet, which forms the southern boundary of the valley, and descended some four miles farther on to the larger stream of the Wad Unila. The ascent and descent we had crossed forms a small watershed for the tributaries of the two rivers, though apparently these mountain torrents only flow in the wet season. At one spot, rather more than half-way, we passed extensive salt-mines, where quite a number of natives were engaged in working rock-salt. The scene was a wild one, the half-nude men with their rough picks hewing away and singing the while, as others piled the salt in native panniers on to the backs of their sturdy little mules. The power of these mountain-mules in overcoming difficulties in the roads is extraordinary, and at one spot we saw a couple literally descending a precipice, followed by a man who only kept his footing by the aid of a sort of alpenstock. The manner in which both man and beasts succeeded in descending seemed to us, as we stood and watched, incredible, yet we were told that he made the journey every day to this spot in the face of the precipice, to collect rock-salt from a small deposit that existed there. At one place where an unusually large supply of the precious mineral existed, a roughly constructed fort had been built, for the mines had been the cause of war for generations amongst the tribesmen living near, their value being, for the arid bleak district, extraordinary. No doubt to more or less reserving to himself the monopoly, as is the case, is owing to a great extent the wealth to-day in the possession of Sid Madani, the Kaid of Glawa. The soil at this part consists principally of shales, strewn with boulders of limestone, no doubt portions of the peaks above, which time, water, and glacier have carried to their present position. The Wad Unila, where our path struck its course, flows nearly due north and south, issuing from a gorge 100 or 200 yards above, and descending for half a mile through a narrow valley before reaching the district of Tiurassín, in which we spent the night of November 5.