[34]The altitudes refer to the highest points of the groups.
[35]This is the altitude of Shendib, the highest of the group in Egypt; but the peaks of Asotriba, which is part of the same mass lying within the Sudan, rise considerably higher.
[36]In the map on [Plate I,] I have shown the watershed crossing directly from Gebel Soaorib across the high intervening mountains to Gebel Is, which is how it appeared to me from my station on Hadal Aweib Meisah. But Mr. Morrow Campbell’s map (referred to on [p. 15]) shows the heads of Wadi Soaorib to extend further west than I could see them; and if this is correct, as it probably is since Mr. Morrow Campbell doubtless approached the watershed more closely than I did, the watershed between Gebel Soaorib and Gebel Is lies further west than I have shown it on Plate I. In drawing the wadis on the geological and tribal maps on Plates [XX] and [XXVI,] I have shown the westward extension of the heads of Wadi Soaorib according to Mr. Morrow Campbell.
[37]The wadis will be found described at length in Chapters [IV] and [V.]
[38]See the Red Sea and Gulf of Aden Pilot, published by the Admiralty.
[39]See my short paper on the meteorology of the Berenice district in Survey Notes, Sept. 1907, p. 325.
[40]I have given short accounts of some of these phenomena in Survey Notes, April 1907, p. 219, and in the Cairo Scientific Journal, May 1908, p. 206.
[41]D’Anville, Mémoires sur l’Egypte. p. 234.
[42]See Barron and Hume, Topography and Geology of the Eastern Desert, Central Portion. Cairo, 1902. pp. 98-104.
[43]Schweinfurth, in Petermann’s Mittheilungen, 1865.