it is entirely separated by wadis, rises to 620 metres above sea; its summit is marked by a triangulation beacon in latitude 22° 10′ 50″, longitude 35° 54′ 0″. In occupying Adar Aweib as a station, it was approached from the Bani Sana pass by following down the Wadi Warabeit and then turning up the Wadi Wieqwer, which leads to the eastern foot of the mountain. The camp was placed about a kilometre north-west of the beacon, at an altitude of 284 metres above sea, and the climb of 336 metres to the top took only an hour and a half. A great variety of flowers could be gathered in the lower part of the ascent; the upper portion was slippery, the slopes consisting of debris of decomposed granite resting just at the angle of repose. In descending from the mountain, I went northwards on foot, whence a steep pass led down to Bir Meheriqa, in the Wadi Di-ib; but the camels had to go round the south end of the mountain by Wadi el Qurat, as the pass was too steep for them. To the south of the group of hills just described, there is a rugged tract of low hills stretching away south to Gebel Shiab. Eastwards this tract becomes lower and more sandy, terminating in a sandy plain with low rocky ridges, over which the Wadi Di-ib pursues its northward course, becoming closed in again by hills abreast of Adar Aweib. =The Mountains of the Alaqi Basin West of Adar Qaqa.= The mountains of this group, which are scattered over an area of some 5,000 square kilometres between latitudes 22° 0′ and 22° 22′, and longitudes 34° 0′ and 35° 20′, are comparatively little known. The positions and heights of all the principal peaks have been fixed by triangulation from considerable distances; but with the single exception of Gebel Muqsim, which was occupied by Mr. Villiers Stuart as his terminal point, none of the area has yet been officially surveyed. The positions determined for the principal peaks will be found included in the list on pp. 51 to 64, and a general idea of the relative positions of the mountains and drainage lines will be obtained from the orographical map on Plate I. A brief reference only to the principal mountains is possible here. =Gebel Anweiyib= (921 metres) and =Eir Arib= (1,112 metres) are on the main watershed. As seen from the north, the former appeared as a long dark range, the latter as a light-coloured high short ridge with a peak at its western end. =Gebels Duag= (1,328 metres) and =Himeitra= (1,231 metres) are connected with the watershed range of Adar Qaqa and Is by westward-running spurs. Gebel Himeitra is a landmark for a well, Bir Himeitra, which is situated a little south of the mountain, and also for the ruins of Darahib, which lie in the Wadi Alaqi some twelve kilometres south-south-west of it. =Gebel Heianai= (1,256 metres) is a long range of mountains between the Wadis Bint el Feqoh and Defeit. =Gebel Heleikonti= (1,151 metres) appeared from the north as a short high steep ridge with a little peak at its western end.