=Gebel Hamra Dom= is a range of remarkable red granite hills rising abruptly from the coast-plain near latitude 22° 40′ and longitude 35° 40′. The range has a total length from north to south of about eleven kilometres, the highest peak being near the centre of the range. A beacon on this highest peak has the position latitude 22° 39′ 6″, longitude 35° 38′ 42″, altitude 389 metres above sea. Care is necessary in sighting this peak, for there are two others near it of nearly equal height; the beacon is on the southernmost one of the three peaks near the centre of the range. A pass leads across the range a kilometre south of the beacon. Gebel Hamra Dom is a locality well known to the Arabs, in consequence of its being occasionally favoured with some rainfall. In January 1907 the district round the mountain was covered with grass after a recent fall of rain, but the hundreds of camels and other animals which the Arabs took to graze at the place had eaten it all up when I arrived there in February. At times of rainfall there is water to be got in the sandy bed of a little wadi to the north of the beacon, at a place called Ti Dabei Hamra Dom; but it does not last long after rain. Gebel Hamra Dom is drained almost entirely by feeders of Wadi Ibib. There are numerous smaller hills to the west of Gebel Hamra Dom, but only the largest of them, =Tibansi Tikam Ankwei=, bears a special name. This is a granite hill rising to 345 metres above sea-level, situated eleven kilometres due west of the beacon on Gebel Hamra Dom. =Gebel Khashab= and =Gebel Beidâ= together form a complex range of high hills mostly composed of schists to the north of Gebel Gerf. The range has its long axis north-west and south-east, with a length of some twenty-five kilometres and an average breadth of about eight kilometres. The highest point of the range is marked by a triangulation beacon on Gebel Beidâ, 715 metres above sea-level, in latitude 23° 0′ 14″, longitude 35° 16′ 54″. The north-west part of the range is drained by the heads of Wadi Khashab, a tributary of Wadi Hodein. The eastern faces are drained by the Wadi Beidâ and various other feeders of Wadi Hodein, while the south and south-west portions of the mass are drained by small tributaries of Wadi Kreiga, itself a tributary of Wadi Hodein. So far as I know, the range can only be crossed by camels at one place, near the centre of its length, where it is cut through by the Wadi Beidâ; coming from the west, one must make for the pass (395 metres above sea, stony but not steep) which separates the heads of Wadi Khashab and Wadi Beidâ; the road is well known as leading to the well called Bir Beidâ. =Gebel Humariai= is an isolated hill, 563 metres above sea, a few kilometres to the west of Gebel Beidâ.