From Ain to Haboob [Footnote: The Anseba, at the point we crossed, is about 4,000 feet above the level of the sea; Haboob about 4,500.] the country is well wooded, and watered by innumerable small streams. The soil is formed of the detritus of the volcanic rocks, specially of feldspar; pumice abounds in the ravines. The channels of the rivulets are the only roads for the traveller. This mountain chain is, on the whole, a pleasant spot, more delightful for the reason that it rises between the arid shores of the Red Sea and the flat, hot, and level plains of the Soudan. The province of Barka is a boundless prairie, about 2,500 feet above the level of the sea, covered at the time of our journey with half-dried grass some five or six feet high, and dotted here and there with small woods of stunted mimosas. From Barka to Metemma we find alluvium as the general formation. Water is scarce; even a month after the rainy season all the rivers are dried up, and water is only obtained by digging in the sand of the dry beds of the river Barka and its tributaries. When we passed through these plains many spots were still green; but a few months later we should have crossed a parched-up prairie little better than the desert itself. Our pretty songsters of Ain were no more to be seen. The guinea-fowl was seldom met with, and only a few tiny antelopes wandered over the solitary expanse. Instead, we were aroused by the roar of the lion, the laugh of the hyena, and we had to protect our sheep and goats, as the spotted leopard was lurking around our tents. On the 31st of October we reached Zaga, a large sloping plain situated at the junction of the Barka and the Mogareib. Water can be obtained at that spot by digging wells in the dried-up beds of the rivers, in sufficient quantity to have induced the Beni Amer to make it their winter encamping-ground.