Mijwell now took Suttum's place in the caravan, and directed the order of our march. Leaving the caravan to pursue the direct road, I struck across the country to the hill of Koukab, accompanied by Mohammed Emin and Mijwell. This remarkable cone, rising in the midst of the plain, had been visible from our furthest point on the Khabour. Some of the Arabs declared it to be an artificial mound; others said, that it was a mountain of stones. Mohammed Emin would tell me of a subterranean lake beneath it, in a cavern large enough to afford refuge to any number of men. After descending some fifty feet into the cave, we found ourselves on the margin of a lake of fresh water. The pitchy darkness prevented our ascertaining its size, which could not have been very great, although the Arabs declared that no one could reach the opposite side. The cave is frequently a place of refuge for the wandering Arabs, and the Bedouins encamp near it in summer to drink the cool water of this natural reservoir. Leaving the cavern and issuing from the ravine, we came to the edge of a wide crater, in the centre of which rose the remarkable cone of Koukab. All around were evidences of the remains of an extinct volcano, which had been active within a comparatively recent geological period, even perhaps within the time of history, or tradition, as the name of the mound amongst the Arabs denotes a jet of fire or flame, as well as a constellation. I ascended the cone, which is about 300 feet high, and composed entirely of loose lava, scoria, and ashes, thus resembling precisely the cone rising in the craters of Vesuvius and Ætna. It is steep and difficult of ascent, except on one side, where the summit is easily reached even by horses. Within, for it is hollow, it resembles an enormous funnel, broken away at one edge, as if a molten stream had burst through it. Anemonies and poppies, of the brightest scarlet hue, covered its sides; although the dry lava and loose ashes scarcely seemed to have collected sufficient soil to nourish their roots. It would be difficult to describe the richness and brilliancy of this mass of flowers, the cone from a distance having the appearance of a huge inverted cup of burnished copper, over which poured streams of blood.