Wadi Di-ib enters Egypt a little west of the 36th meridian, as a broad sandy drainage channel with many trees. Its bed is here only 170 metres above sea-level. Wadi Di-ib receives two feeders from the east near the 22nd parallel; the Wadi Shendib,[100] draining the western flanks of the high mountain mass of Gebel Shendib, is believed to join Wadi Di-ib a little south of the frontier, while the Wadi Hareitra, draining the north-eastern flanks of Gebel Shendib and the western slopes of Gebel Hanquf, probably enters Di-ib a little north of it. For the first eighteen kilometres of its course north of 22°, Wadi Di-ib flows northward over a sandy plain, with low hills and ridges, their feet often swathed in drift sand, on either side. It then receives an important tributary from the west, called Wadi el Qurat, draining the north slopes of Gebel Shiab and the hilly country between Gebel Mashushenai and Adar Aweib. After receiving Wadi el Qurat, Wadi Di-ib enters mountainous country, being shut in for some fifteen kilometres by Adar Aweib on the east and Gebel Balatitda on the west. In its northerly course here Wadi Di-ib receives many feeders from the hills, of which two entering from opposite sides near Bir Meheriqa are of interest. That from the east is really a drainage channel from the sandy plain south of Gebel Sul Hamid; but it is choked by huge accumulations of drift sand so that the drainage never reaches Wadi Di-ib, but accumulates in a depression called O Harbub, about four kilometres above its mouth. This channel, though very sandy, is quite a practicable road, as I found by traversing it on my way to Gebel Elba from Bir Meheriqa. The feeder from the west, which enters Wadi Di-ib about one and a half kilometres below Bir Meheriqa, is called =Wadi Salalob=; it drains the north face of Adar Aweib, and heads in a very steep pass into Wadi Wieqwer. I managed to get my riding camel over this pass only with difficulty when unmounted, and it is quite impracticable for loaded camels; the rise in the last kilometre before reaching the top of the pass from the direction of Wadi Di-ib is over one hundred metres, the summit of the pass being 315 metres above sea-level. =Bir Meheriqa= is a spring situated in the mouth of a small gully at the foot of Gebel Balatitda, close to the east side of Wadi Di-ib, and practically on the same level as the wadi floor (120 metres above sea-level), so that it is extremely easy of access. The floor of the gully is covered with conglomerate of recent formation and in this are several holes with pools of clear water about one metre in diameter by twenty centimetres deep, which fill as fast as emptied. The water is rather salt, but is drinkable. The portion of Wadi Di-ib which lies among the mountains has a floor of sandy mud, with abundance of trees and plants, among which several gazelles were grazing as I passed through.