The sky was overcast, and evening coming on, when we reached the summit-level, which by our observations is 3,905 feet (1,190·2 m.) above the sea-level.[2] It did not appear to us that the surrounding hills anywhere rise more than 200 or 300 feet above the point where we passed, and, as we afterwards assured ourselves, they gradually diminish in height as they stretch northward from the main range of the Atlas. Although the matter is not free from doubt, we incline to agree with M. Balansa in believing that the hills we had now crossed form the watershed between the affluents of the stream running northward by Sheshaoua, and those of the Oued Kseb, which reaches the sea close to Mogador. Beaudouin’s map, usually correct as regards the accessible parts of the country, represents things quite otherwise; according to him all the drainage of this district is carried NNW. by a stream which passes east of the Djebel Hadid, and reaches the sea between Mogador and the mouth of the Oued Tensift; while the Oued Kseb, or Oued el Ghored of Beaudouin, has a course of only some twenty miles, and drains but a small tract of country near the coast. In most countries such a question would admit of no doubt; but, between absorption by irrigation and loss by evaporation, the streams in South Marocco dwindle away on their course so fast, that only at certain seasons it is possible to trace their course. As now advised, we believe that many considerable streams unite in the Oued Kseb, although this, at its mouth, is a mere trickling rivulet, unable to keep a definite course through the Mogador sands to the sea; while the stream laid down east of the Djebel Hadid has not, so far as we could ascertain, any real existence.