220 Lead Mines of Kohel et Ter&feh. [No. 3. 



and a few of the larger blocks are slightly rounded. This diluvium 

 covers the surface of this part of the Kohel.* 



The strata of the Kohel hill here have a very slight easterly dip. 

 The surface of the ravines passing through it, are inclined in a similar 

 direction, but at a greater angle. 



Lead Mines of Kohel et Terdfeh. 



The mines are situated about 1 \ mile from the W. shore of the Red 

 Sea, as before observed. The ore, galena and carbonate of lead, 

 occurs in an argillo-siliceous schist, associated with small quantities of 

 sulphur and iron — a poor carbonate. The Bey visited seven excava- 

 tions, which are mostly from three to four feet broad, about five 

 feet high, and run down in inclined planes cut in steps. Galena was 

 found in the shaft worked by Brochi ; but the indications discovered 

 are not considered favourable. Besides other minerals, titaniated iron, 

 manganese, zinc and fire-clay have been discovered here. The surface 

 of the rock between the mines and the shore is coral limestone, covered 

 with a gravel of granitic, gneiss, porphyry pebbles. 



The mines were worked by the ancients : and the ruins of an old, but 

 not extensive station still exist, in detached buildings of loose stones 

 and foundations — some round, — others square. Water is brought 

 from Gebel Egleh, or Edjleh — four or five hours' distance, but is bad, 

 brackish, and causes vomiting. 



The fersh of the Kohel produces a good deal of Siydl wood, (Acacia 

 Siydleh.) 



From the mines the Bey took a S. W. direction by Wddis Egli and 

 Sakkari Siydleh, and after a day's march arrived at Wddis Allem and 

 Zub&ra. In "Wadi Tumtubah are Hieroglyphs and a Zodiac, sculp- 

 tured on some porphyro-felspathic rocks associated with gneiss, schists, 

 and quartz, containing much argillaceous matter. At Zubdra the 

 principal rock is a ferruginous mica schist with quartz veins, containing 

 bits of emerald. Grey granite, with silvery mica, micaceous amphibole, 

 black steatite, and nodules of iron, occurs, also gneiss. 



* The site of the granites, porphyries and felspars composing the " diluvium," 

 is not far off, as the Bey has a note of having passed some felspathic and granite 

 hills with quartz, invaded by porphyry and serpentine, the day before he reached 

 the Kohel. These plutonic rocks lie westerly from the Kohel, and continue two 

 days' journey in a N. W. direction, forming the Kabarais hills. The Tella-t-el 

 Kabarais has a reservoir containing twelve months water. At Wadi el Assel, N. E. 

 from Kosseir, and Wadi Hinduseh, they become intermingled with the sedimen- 

 tary rocks, limestone and sandstone. At Wddi Zug el Bahar two chains of marly 

 limestone, chalk and psammites occur, overtopped by higher, and isolated clusters 

 of felspathic rocks. 



