Gebels Um Hegilig, Reyan, and Shut, are high hills situated between the Wadis Shut and Gumudlum, both tributaries of Khoda. =Gebel Um Hegilig=, a dark peak rising to 966 metres above sea-level, is almost exactly midway between Gebels Dahanib and Kalalat. =Gebel Reyan=, a little further south-east, is a group of peaks and ridges of which the highest point is 863 metres above sea. =Gebel Shut=, the most remarkable of the three, is a great cone rising to 930 metres above sea, about five kilometres north of the Wadi Khoda. A very large galt is said to exist among these hills, approachable from Wadi Shut; it is probably in one of the feeders draining westward from Gebel Reyan, which name signifies “the wet mountain.” =Gebel Um Bisilla= is a dark mountain of gabbro rising conspicuously among lower hills twenty-two kilometres west of Gebel Dahanib. The triangulation beacon on its summit is in latitude 23° 45′ 34″, longitude 34° 57′ 39″, and 824 metres above sea-level. Gebel Um Bisilla is drained by Wadi Um Bisilla, the head of which encircles its southern half, while the northern flanks are drained by feeders of the Wadi el Khiua, which courses south-west to join Wadi Um Bisilla about ten kilometres west of the mountain. There is an easy passage for camels round the east side of the mountain from the head of Wadi Um Bisilla into a feeder of Wadi Abu Nilih, a tributary of Wadi El Khiua. In ascending the mountain I pitched my camp in one of the gullies draining from it to Wadi Um Bisilla, at an altitude of 513 metres above sea and 1,300 metres south-east of the beacon. The climb of 311 metres from this camp to the summit presented no difficulties, and occupied only an hour and a half. =Erf el Gimal= is a high dark ridge surrounded by lower hills ten kilometres west-south-west of Gebel Um Bisilla. Its highest point, the west end of the ridge, is 673 metres above sea. About seven kilometres further west is a conspicuous conical hill called =Gebel Abu Shigelat=.