=Gebel Dahanib= is a mountain of dark coloured rocks (diorite and gabbro), situated twelve and half kilometres south-east of Gebel Kalalat and eleven kilometres north of the Wadi Khoda. Its summit, on which is a triangulation beacon, is in latitude 23° 45′ 44″, longitude 35″ 11′ 10″, and 1,270 metres above sea-level. Gebel Dahanib is surrounded by other mountains and hills, and access to it is not very easy. In order to reach it from Gebel Kalalat I had to make a journey down the Wadi Kalalat, along the coast-plain and up the Wadis Khoda and Allawi, a total distance of over eighty kilometres, although the direct distance between the two peaks is only twelve and a half kilometres. By ascending one of the heads of the Wadi Allawi until camels could get no further, I was able to pitch a camp 540 metres above sea-level and three kilometres south-west of the beacon, leaving 730 metres to be climbed on foot. The ascent, though tiring, was free from difficulties or dangers, and occupied two and a half hours. A galt, containing only a small supply of water at the time of my visit, exists a little further up the head of the wadi than where I fixed my camp. There is a good view from the summit, but in the winter months Dahanib, like all the mountains near the coast, is frequently wrapped in clouds for days together. Of seven days spent on the summit in February 1907, three were passed entirely in clouds, while only portions of the other four were free from fog or haze. It was on Gebel Dahanib that I first noticed the curious electric phenomena which may be observed at high stations when electrified clouds are passing close overhead, my attention being first drawn to them by a spark from the eye-piece of my theodolite striking me over the eye. At the same moment a rapid succession of sparks a centimetre or so long passed between my hand and the adjusting screws of the instrument, while both the theodolite and my hair hissed loudly. In this and all other cases of a like kind, I judged it best to suspend operations for a time and descend a little below the summit till the cloud had passed over. Gebel Dahanib is drained by the Wadis Allawi, Um Tawil, and Shut, all tributaries of Wadi Khoda, which course for a considerable distance through the surrounding hills before reaching the main trunk wadi. PLATE XIV. [Illustration: Gebel Kalalat.] [Illustration: Summit of Gebel Faraid. (Granite).]