The main head of Wadi Gimal is called =Wadi Seyet=. It originates between Gebel Wadhait and Gebel Dreb about latitude 22° 35′, and by means of many feeders drains the east face of Gebels Dreb and Gerf. The principal feeder of Wadi Seyet from the south-west is =Wadi Wadhait=, collecting the south drainage of Gebel Korabkansi, while on the east the =Wadi Sherefa el Gharbi=, which leads to the important Sherefa pass, contributes the drainage from the northern parts of Gebel Dreb and the south-west parts of Gebel Gerf. These both join Wadi Seyet a little south of latitude 22° 40′, while a little further down there enter from the east two small feeders called =Wadi Delawet= and =Wadi Buyet=. The name Seyet is given to this wadi only down to where it passes through a narrow gap between high hills in latitude 22° 42′; below that point it is called Wadi Gemal. Wadi Seyet is remarkably well wooded, containing an immense number of fine large acacia trees, and presented an almost park-like appearance at the end of 1907. It also contains a deep well, =Bir Sararat Seyet=, excavated in the wadi floor just above the gap between the hills above referred to. This well was full of downwash in the winter of 1907. It is said to be twenty metres deep and to yield plenty of good water, but at that time there was plenty of water in galts in the mountains, and the Arabs said they preferred to derive their supplies from these so long as they lasted, only digging out the well when further supplies were necessary.[99] An unnamed feeder from the west, joining Wadi Seyet just below the well, leads by an easy pass into the head of =Wadi Hushenab=, which drains through Wadi Sortdau into the Wadi Gemal lower down its course.