198 John Hogg, Esq., on the Geography and 
Wadi, could be traced from thence across the desert El Tyh 
all the way to the sea. This, I conclude, can only be one of 
the branches of Wadi Nesil, which crosses that desert on the 
pilgrim route, between Gebel Thughar and Nakhl; and 
thence it probably joins the Wadi-el-Arish,—if Russegger be 
correct in laying down the course of that Wadi to the west of 
Gebel Yelak and Gebel Mishea. At that Ras, the range of 
Rahah terminates ; and another chain, bending south-east 
and east, receives the name of Gebel-el-Tyh, and stretches out 
into two branches as far as the borders of the Gulf of Akaba. 
Many trees of the tamarisk, acacia, and date-palm, are seen 
in Wadi Gharandel, where rock-salt occurs ; the last likewise 
is detected in Wadi Useit, the Oszatta of Burckhardt,—a 
ravine between high chalky crags; consequently, the springs 
are all brackish and Jdztter, designated by the Arabs by the 
words Morr or Morra. After the small stony plain at the 
south-west extremity of Wadi Gharandel is passed, a more 
mountainous country begins, and is a continuation, for some 
distance southwards, of the cretaceous series, or Kreiderethe 
of Russegger. 
The high limestone mount, through which the line of 33° 
east longitude passes, and which forms a conspicuous pro- 
montory in the gulf, is known to the Arabs under the appel- 
lation of Gebel Hamam, or the ‘“‘ Mount of the Baths,’’ be- 
cause at its northern end are situate the hot sulphur springs, 
called El Hamam Faroun, “ Pharaoh’s Baths,” and after- 
wards more fully noticed. 
Gebel Hamam itself is of the secondary formation, or cre- 
taceous series, chalk mostly covered with jlints, which give 
the entire mountain a dark appearance, except where the 
chalk is most visible. It is said to be about 1500 feet in 
height above the sea. 
Wadi Schebekeh, Burckhardt’s Shebeyke (a net) is a broad 
valley, having steep cliffs on both sides; there the strata are 
calcareous, and run in even horizontal beds. Much rock- 
salt occurs in Wadi Taibeh (“good”) in pieces beautifully 
white ; for this reason the water in both Wadis Schebekeh 
and Taibeh is very brackish. 
Thence into Wadi Hommr, or Humr of Robinson, where 
