Smith's Bible Dictionary (1863)
(thorny). Nearly in the centre of the peninsula which stretches between the horns of the Red Sea lies a wedge of granite, grunstein and porphyry rocks rising to between 8000 and 9000 feet above the sea. Its shape resembles st scalene triangle. These mountains may be divided into two great masses-that of Jebel Serbal (8759 feet high), in the northwest above Wady Feiran, and the central group, roughly denoted by the general name of Sinai.
This group rises abruptly from the Wady es-Sheikh at its north foot, first to the cliffs of the Ras Sufsafeh, behind which towers the pinnacle of Jebel Musa (the Mount of Moses), and farther back to the right of it the summit of Jebel Katerin (Mount St. Catherine, 8705 feet) all being backed up and. overtopped by Um Shamer (the mother of fennel, 9300 feet), which is the highest point of the whole peninsula.