We entered a dead level plain of orange-colored sand, surrounded by pyramidical hills. The surface was strewn with objects resembling cannon shot and grape of all sizes from a 32-pounder downward, and looked like the old battle-field of some infernal region--rocks glowing with heat, not a vestige of vegetation, barren, withering desolation. The slow rocking step of the camels was most irksome, and, despite the heat, I dismounted to examine the Satanic bombs and cannon shot. Many of them were as perfectly round as though cast in a mould, others were egg-shaped, and all were hollow. With some difficulty I broke them, and found them to contain a bright red sand. They were, in fact, volcanic bombs that had been formed by the ejection of molten lava to a great height from active volcanoes; these had become globular in falling, and, having cooled before they reached the earth, they retained their forms as hard spherical bodies, precisely resembling cannon shot. The exterior was brown, and appeared to be rich in iron. The smaller specimens were the more perfect spheres, as they cooled quickly; but many of the heavier masses had evidently reached the earth when only half solidified, and had collapsed upon falling. The sandy plain was covered with such vestiges of volcanic action, and the infernal bombs lay as imperishable relics of a hailstorm such as may have destroyed Sodom and Gomorrah. Passing through this wretched solitude, we entered upon a scene of surpassing desolation. Far as the eye could reach were waves like a stormy sea, gray, coldlooking waves in the burning heat; but no drop of water. It appeared as though a sudden curse had turned a raging sea to stone. The simoom blew over this horrible wilderness, and drifted the hot sand into the crevices of the rocks, and the camels drooped their heads before the suffocating wind; but still the caravan noiselessly crept along over the rocky undulations, until the stormy sea was passed; once more we were upon a boundless plain of sand and pebbles. In forty-six hours and forty-five minutes' actual marching from Korosko, we reached Moorahd, "the bitter well." This is a mournful spot, well known to the tired and thirsty camel, the hope of reaching which has urged him fainting on his weary way to drink one draught before he dies. This is the camel's grave. Situated half way between Korosko and Abou Hammed, the well of Moorahd is in an extinct crater, surrounded upon all sides but one by precipitous cliffs about three hundred feet high. The bottom is a dead flat, and forms a valley of sand about two hundred and fifty yards wide. In this bosom of a crater, salt and bitter water is found at a depth of only six feet from the surface. To this our tired camels frantically rushed upon being unloaded.