PLATE VII. [Illustration: Summit of Gebel Nugrus. (Granite).] [Illustration: Summit of Gebel Abu Hamamid. (Schists).] =Gebel Migif= is a very spiky gneiss mass situated about thirteen kilometres west of Gebel Nugrus. It has several summits of about equal height, fairly close together, but separated by deep clefts. The triangulation beacon is on the western peak, in latitude 24° 47′ 23″, longitude 34° 27′ 30″, 1,199 metres above sea-level. The foliation planes of the rock dip to the north, and the only safe means of ascent is up the resulting north slopes. The south aspect is precipitous. When ascending the mountain, I pitched my camp 2·7 kilometres north of the beacon, in a gully draining into Wadi Shait, west of another gully containing the water holes called Galt Um Karaba, at an altitude of 607 metres above sea-level. The ascent, of 592 metres, took two hours steady climbing, and was not difficult. I kept on the west side of the gorge till near the top, and this is the best way up the mountain, for I found the gorge itself to be steep and abounding in impassable precipices. The view from Gebel Migif is shut in to the east by the high masses of Gebels Hafafit and Nugrus; Gebels Atut and Igli are conspicuous to the north; to the south-east, one overlooks the great sandy basin of Wadi Hafafit; while to the south-west is more open country in which the two remarkable cones of El Nahud, the sharp peak of Gebel Abu Khrug, the ridge of Gebel Hamrat Selma, and closer in the ranges called Gebel Dweig, are striking features. On a clear day, the huge mountains of Hamata and Abu Hamamid, eighty kilometres to the south-south-east, can be discerned. The photographs on Plate VIII will give an idea of the views looking towards Gebels Nugrus and Dweig respectively. In the upper view Gebel Nugrus is seen behind the Hafafit range; in the lower, the masses close in are Gebel Dweig, while in the distance, to the right of the centre, is Gebel Hamrat Selma, and behind it on the horizon the spike of Gebel Abu Khrug. The precipitous nature of the south side of Gebel Migif is evident in both views. The north and west sides of Gebel Migif are drained by the Wadi Shait, which passes the foot of the mountain; the steep south face drains into Wadi Dweig, a tributary of Shait; while the eastern face, flanked by low hills, is drained by Wadi Hafafit. Gebel Dweig is a small group of high hills close to the south of Gebel Migif, with which it combines to form a _cul-de-sac_ round the head of Wadi Dweig. Gebel Dweig resembles Gebel Migif in character, except that it is lower; the hill on the south side of the narrow opening by which Wadi Dweig leaves the _cul-de-sac_ is 864 metres above sea, and this is believed to be the highest of the group. The eastern part of the mass is a curiously curved range sweeping round nearly in a semicircle.