During the dead of night, when restless unrefreshing slumbers on the heated ground had hushed the camp in all its quarters, the elders, in great consternation, brought a report that the Bedouin war-hawks, who nestle in the lap of the adjacent wild mountains, were collecting in the neighbourhood with the design of making a sudden swoop upon the kafilah, for which reason the European escort must be prepared for battle, and muskets be discharged forthwith, to intimidate the lurking foe. They were informed, in reply, that all slept upon their arms, and were in readiness; but Mohammad Ali came shortly afterwards to announce that matters had been amicably adjusted with the aid of a few ells of blue cloth; and under the care of a double sentry, the party slept on without further disturbance until two in the morning, prior to which hour, the moon, now on her wane, had not attained sufficient altitude to render advance practicable. The aid of her pale beams was indispensable, in consequence of the existence of the yawning pass of Rah Eesah, not one hundred yards distant from the encampment just abandoned, but till now unperceived. It derives its appellation, as "the road of the Eesahs," from the fact of this being the path usually chosen by that hostile portion of the Somauli nation, on the occasions of their frequent forays into the country of the Danakil, with whom, singularly enough, an outward understanding subsists. Its depths have proved the arena of many a sanguinary contest, and are said, after each downpouring of the heavens, to become totally impassable, until again cleared of the huge blocks of stone, the detritus from the scarped cliffs, which so choke the bed of the chasm, as to impede all progress. The labour of removing these, secures certain immunities to the wild pioneers, who levy a toll upon every passing caravan, and who in this instance were propitiated, on application, by the division of a bale of blue cotton calico, a manufacture here esteemed beyond all price. A deep zig-zagged rent in the plateaux, produced originally by some grand convulsion of nature, and for ages the channel of escape to the sea of the gathered waters from Jebel Goodah, winds like a mythological dragon through the bowels of the earth, upwards of three miles to the southward. Masses of basalt of a dark burnt brown colour, are piled perpendicularly on either side, like the solid walls of the impregnable fortresses reared by the Cyclops of old; and rising from a very narrow channel, strewed with blocks of stone, and huge fallen fragments of rock, tower overhead to the height of five or six hundred feet. One perilous path affords barely sufficient width for a camel's tread, and with a descensus of one foot and a half in every three, leads twisting away into the gloomy depths below, dedicated to the son of Chaos and Darkness, and now plunged in total obscurity.