These gloomy cliffs, approaching the maritime plain, sweep away to the south, and melt into the "Red Hills" visited on our first excursion. They are known as the Jebel el-'Abdayn--"of the Two Slaves:" this, perhaps, is the Doric pronunciation of the Bedawin for Abdín--"slaves." Presently we sighted the familiar features of the seaboard, described in my first volume, especially the Rughámat el-Margas to the north; and westward the Gulf of 'Akabah, looking cool and blue in the Arabian glare. After five hours and thirty minutes (= seventeen miles and a half) in the saddle we reached Makná. I had thought of encamping near the "Praying-place of Moses," a fine breezy site which storms would have made untenable. As at Sharmá, camels must turn off to the right over the banks when approaching the mouth of the Wady Madyan, whose bed is made impassable by rocks and palm-thicket. We then proposed to pitch the tents upon the valley sands within the "Gate," but this was overruled by the Sayyid, who told grisly tales of fever and ague. Finally, we returned to our former ground, near the old conglomerates and the mass of new shells, which ledge the shore of the little harbour. Approaching it, we were delighted to see the gunboat Mukhbir steaming up, despite the contrary wind, from Sharm Yáhárr; she was towing the Sambúk, which brought from 'Aynúnah Bay our heavy gear, rations, and tools. This was a stroke of good luck: already we were on half rations, and provant for men and mules threatened to run short. Our week at Makná (January 25--February 2) justified the pleasant impression left by the first visit, and enabled us to correct the inaccuracies of a flying survey. This "Valley of Waters," with its pink and yellow (chloritic) sands, is bounded on the right near the sea by a sandbank about one hundred feet high, a loose sheet thinly covering the dykes of syenite and the porphyritic trap which in places peep out. Possibly it contains, like the left flank, veins of quartz, lowered by corrosion, and concealed by the sand-drift spread by the prevalent western winds. The high-level abounds in detached springs, probably the drainage of the Rughámat Makná, the huge "horse" or buttress of gypsum bearing north-east from the harbour. The principal veins number three. The uppermost and sweetest is the Ayn el-Tabbákhah; in the middle height is El-Túyuri (Umm el-Tuyúr), with the dwarf cataract and its tinkling song; whilst the brackish 'Ayn el-Fara'í occupies the valley sole. Besides these a streak of palms, perpendicular to the run of the Wady, shows a rain-basin, dry during the droughts, and, higher up, the outlying dates springing from the arid sands, are fed by thin veins which damp the rocky base. Hence, probably, Dr. Beke identified the place with the "Elim" of the Exodus: his artist's sketch from the sea (p. 340) is, however, absolutely unrecognizable.